Article
Engineering, Electrical & Electronic
Behrouz Shahbahrami, Sayed Mahmood Rabiee, Reza Shidpoor, Hamed Salimi-Kenari
Summary: Zinc-substituted cobalt ferrite nanoparticles were synthesized and studied for their crystal structure, morphology, and magnetic properties. The addition of zinc affected the strain in the structures, resulting in changes in particle morphology and magnetic behavior.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Ceramics
A. S. Kakde, G. C. Wakde, M. A. Wani, V. M. Gaikwad, N. S. Meshram, A. B. Lad, K. G. Rewatkar, R. M. Belekar
Summary: This research module focuses on the microwave-assisted sol-gel combustion synthesis of rare earth doped Ni-Co-Zn spinel ferrite nanoparticles. Various characterization techniques were used to investigate the phase formation, morphologies, crystal structure, and magnetic properties of the samples. The addition of rare earth and non-magnetic ions was found to influence the coercivity, magnetic interaction constant, permeability, and Curie temperature of the ferrite. The obtained nanocrystalline ferrites have potential applications in switching devices and high-frequency devices.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
A. Subha, M. G. Shalini, B. N. Sahu, S. Rout, Subasa C. Sahoo
Summary: Nanocrystalline Cu-ferrite samples were synthesized using co-precipitation method and their structural and magnetic properties were investigated by varying the pH value and annealing temperature. The results showed that the structure and magnetic properties of Cu-ferrite were affected by pH value, annealing temperature, and grain size.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Thermodynamics
Achmad Maulana Soehada Sebayang, Lidia Puspita Sari Sagala, Perdinan Sinuhaji, Nining Sumawati Asri, Anggito P. Tetuko, Eko Arief Setiadi, Lukman Faris Nurdiansyah, Masno Ginting, Perdamean Sebayang, Muhammadin Hamid, Martha Rianna
Summary: Zn0.6Ni0.2Cu0.2Fe2O4 was successfully synthesized using the co-precipitation method at calcination temperatures of 300°C, 400°C, and 500°C. Characterization through TGA/DSC, XRD, and FE-SEM revealed that optimal properties were obtained at a calcination temperature of 500°C, with values of Ms = 31.79 emu/g, Mr = 12.06 emu/g, and Hc = 331.06.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Physics, Multidisciplinary
A. M. Faramawy, G. Mattei, C. Scian, H. Elsayed, M. I. M. Ismail
Summary: Nanoparticles of CrxAl0.5-xCoFe1.5O4 spinel ferrites were synthesized by co-precipitation technique to study the effects of chromium and aluminum ion substitutions on structure, magnetic properties, permeability, Curie temperature, and AC loss. The results showed that lattice constant and porosity increased with higher Cr3+ concentration, while magnetization, coercivity, and Curie temperature decreased. Additionally, magnetic loss increased with increasing Cr3+ concentration in all samples.
Article
Chemistry, Inorganic & Nuclear
Nguyen Anh Tien, V. O. Mittova, B. V. Sladkopevtsev, Vo Quang Mai, I. Ya Mittova, Bui Xuan Vuong
Summary: Undoped and Y-doped NiFe2O4 nanoparticles were successfully synthesized. The appropriate annealing temperature and time to obtain single-phase spinel NiFe2-xYxO4 is 800 degrees C for 1 h. The samples demonstrated strong optical absorption in the UV and visible ranges, as well as strong ferromagnetic behavior.
SOLID STATE SCIENCES
(2023)
Article
Acoustics
Yuandong Peng, Chao Xia, Minghui Cui, Zhixin Yao, Xuwu Yi
Summary: Ni0.4Cu0.2Zn0.4Fe2O4 ferrites nanoparticles were successfully synthesized via co-precipitation assisted with ultrasonic irradiation. The effects of ultrasonic power and reaction temperature on the microstructure and magnetic properties were investigated, with higher saturation magnetization and coercivity observed at lower reaction temperature. The outcomes demonstrate that ultrasonic irradiation has positive effects on improving the microstructure and magnetic properties of the ferrite nanoparticles.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Materials Science, Ceramics
Simi Debnath, Avisek Das, Ratan Das
Summary: Thermal heat treatment method was used to synthesize PVP-capped nickel ferrite and cobalt-doped nickel spinel ferrite nanocrystals, XRD analysis confirmed formation of pure FCC nanocrystals, HRTEM study indicated different sizes for NF and CNF, EDX analysis verified elements present in the samples, and structural parameters were calculated for both nickel and cobalt-doped nickel ferrite nanocrystals from XRD data analysis. Cation distribution showed significant change due to doping, FTIR analysis confirmed phase purity, and magnetic characterization showed improvement of magnetic parameters in CNF nanocrystals.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
R. Sagayaraj, S. Sebastian
Summary: Z-type hexaferrites with polycrystalline characteristics were synthesized using co-precipitation method. The XRD results confirmed the polycrystalline phase and 6 nm particle size of the Z-type ferrite nanoparticles. The FTIR spectrum showed resonances corresponding to tetrahedral and octahedral voids and a stabilized ferrite structure. These special ferrite materials exhibited ferrimagnetic properties and high coercivity, making them useful for microwave absorption, high-frequency applications, and magnetic recording media.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Jialing Wang, Aimin Sun, Ying Jiang, Xiaoyan Huang, Liqiong Shao, Yanchun Zhang
Summary: Ce3+-doped Mg-Co ferrite powder was prepared by sol-gel spontaneous combustion method. XRD, FTIR, SEM, and VSM were used for structural and magnetism analysis. The results show that Ce3+ content has an effect on the magnetism of ferrite.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Salma Aman, F. F. Alharbi, Soumaya Gouadria, Hafiz Muhammad Tahir Farid
Summary: The BaLax-Fe2-xO4 series nanomaterials synthesized via sol-gel technique exhibited changes in crystal size, lattice constant, grain size, and bulk density due to lanthanum ion substitution. The dc-resistivity and activation energy increased with increasing lanthanum content, while the temperature-dependent resistivity and activation energy decreased with increasing temperature. The magnetic characterization showed that all samples had soft magnetic nature, with high magnetic coercivity being crucial for high-frequency applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
S. K. Shaw, A. Gangwar, A. Sharma, S. K. Alla, S. Kavita, M. Vasundhara, Sher Singh Meena, P. Maiti, N. K. Prasad
Summary: A single phase equi-atomic high-entropy oxide with spinel structure was successfully synthesized using microwave assisted co-precipitation technique, exhibiting high crystallinity and stability at high temperatures. The uniform elemental distribution was confirmed through STEM-EDS elemental mapping. The ferrimagnetic behavior of the obtained HEO was confirmed through magnetic characterizations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Rajinder Kumar, Rohit Jasrotia, Jahangeer Himanshi, Jahangeer Ahmed, Anant Vidya Nidhi, Saad M. Alshehri, Louis W. Y. Liu, Supriya A. Patil, Ridhima Aggarwal, Sachin Kumar Godara, P. B. Barman, Ragini Raj Singh, Abhishek Kandwal
Summary: Co-doped Ni-Zn nanoferrites with excellent crystalline structure, magnetic properties, and antibacterial activity were synthesized using a novel method.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
H. G. Abd-Elbaky, M. Rasly, Reem G. Deghadi, Gehad G. Mohamed, M. M. Rashad
Summary: In recent years, the eco-friendly strong-base free synthesis has been applied to the synthesis of spinel cobalt ferrites, leading to successful preparation of the ferrites. By adjusting the composition and structure, the magnetic and optical properties of the cobalt ferrites were controlled, providing a feasible approach for magneto-optical applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Chemical
Abhishek Kumar, Krunal M. Gangawane
Summary: This work investigates the effect of four different precipitating agents on the structural and magnetic properties of synthesized ferromagnetic nanoparticles. The results show that NH3 in an alcohol solution as a precipitating agent exhibits higher magnetic properties but a longer response time. On the other hand, NaOH in an aqueous solution provides a shorter reaction time and lower cost, but the particle surface and magnetic characteristics are inferior.
Article
Materials Science, Multidisciplinary
M. Bessimou, R. Masrour
Summary: The magnetic properties and magnetocaloric effect of Dy2CoMnO6 were studied using the Monte Carlo study. The magnetisation vs. temperature relationship and the ferrimagnetic-paramagnetic transition temperature were determined. Furthermore, the relationship between magnetic entropy changes and temperature was established. These results provide comprehensive information for understanding the magnetic and magnetocaloric properties of this material.
PHILOSOPHICAL MAGAZINE
(2023)
Article
Engineering, Electrical & Electronic
M. Y. Raia, R. Masrour, M. Hamedoun, J. Kharbach, A. Rezzouk, A. Hourmatallah, N. Benzakour, K. Bouslykhane
Summary: This study investigates the structural, magnetic, electronic, thermodynamic, optical, and thermoelectric properties of Heusler alloy Co2Fe1-xTixGa using the full potential linearized augmented plane-wave method within density functional theory. The influence of transition metal element doping on lattice constant, bulk modulus, and band gap for quaternary alloys is found to have a linear dependence on alloy composition with a small deviation. The calculated results are in good agreement with experimental data, and the equilibrium L2(1) structure shows that all concentrations are half-metallic using the GGA + U scheme. Moreover, the study also explores the thermodynamic effects of pressure and temperature, as well as the optical parameters and thermoelectric properties of Co2Fe1-xTixGa in the temperature range of 300-900 K.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
M. Y. Raia, R. Masrour, M. Hamedoun, J. Kharbach, A. Rezzouk, A. Hourmatallah, N. Benzakour, K. Bouslykhane
Summary: In this study, the thermodynamic, band structure, density of states, magnetic, thermoelectric, and optical properties of Co2TiAl, Co2TiGa, and Co2TiIn full Heusler compounds in the L2(1) phase were investigated using the full-potential linearized augmented plane wave (FP-LAPW) method. The results show that the system is more stable in the ferromagnetic state. The elastic constants satisfy the stability criteria, and the calculated magnetic moments confirm the half-metallic behavior of Co2TiAl and Co2TiGa systems.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
A. Abjaou, R. Masrour, E. K. Hlil
Summary: The high-entropy alloy (Al25Fe30Mn25Ni20)(1-x)Nd-x was synthesized and its structure was investigated. It was found that the alloy crystallized in face-centered cubic and body-centered cubic structures depending on the Nd content. The chemical composition analysis revealed the formation of a single body-centered cubic solid solution between 760℃ and 1480℃.
PHILOSOPHICAL MAGAZINE
(2023)
Article
Physics, Condensed Matter
R. Masrour
Summary: The behavior of Ising nanowires with core-shell structure and mixed spins has been studied using Monte Carlo simulations. The magnetic phase diagrams depend on crystal and magnetic fields, as well as exchange interaction and crystal field. The simulations also revealed the dependence of magnetization and transition temperature on exchange interactions. This research has implications for various applications including spintronics, logic devices, magnetic recording media, and bioengineering.
EUROPEAN PHYSICAL JOURNAL B
(2023)
Article
Electrochemistry
A. Erraji, R. Masrour
Summary: The structural, electronic, and optical properties of Li2ZrN2 compound were investigated using first-principles calculations. It was found that Li2ZrN2 can be a suitable candidate to be used as a cathode for Li-ion battery.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Tasaduk Ahmad Wani, Gopalakrishnan Suresh, Rachid Masrour, Khalid Mujassam Batoo, Asif Rasool
Summary: NixZn(1-x)Fe2O4 ferrite nanoparticles with different Ni2+ substitution ratios were successfully synthesized and their structural, morphological, optical, and magnetic properties were studied. The nanoparticles exhibited a single phased cubic spinel structure and sizes ranging from 28 nm to 46 nm. The FTIR spectra confirmed the spinel lattice structure of the nanosamples. The SEM and TEM images showed agglomerated hexagonal and nearly spherical nanoparticles. UV-DRS absorption spectra revealed a visible light absorption band in all samples. The M - H plots indicated paramagnetic and soft ferrimagnetic behavior depending on the Ni2+ substitution ratio.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
M. Imami, R. Masrour
Summary: This study investigates the magnetic and electrical behavior of the perovskite complex EuFe(0.5)Mn(0.5)O(3), which crystallizes in an orthorhombic structure. Density functional theory and Monte Carlo simulations were used to analyze the magnetic and electrical properties, including magnetization, transition temperature, magnetic entropy fluctuation, specific heat, adiabatic temperature variation, and relative cooling power. The compound exhibits spin-reorientation phenomena and behaves like a conducting metal.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
G. Kadim, R. Masrour
Summary: The photovoltaic properties are determined by the internal (IQE) and external (EQE) quantum efficiency. In order to theoretically calculate this quantum efficiency, we have investigated the optical and electronic properties of Cd1-xZnxTe bulk and CdTe thin film. CdTe thin film is a highly interesting narrow band gap semiconductor with a high absorption rate in the visible solar spectrum, making it promising for new-generation electronics and photo-electronic devices. Cd1-xZnxTe bulk is a semiconductor with a slightly decreasing band gap values linearly as the Zn content increases. The optical reflectivity and absorption are discussed in detail. The IQE and EQE quantum efficiency of CdTe thin film and Zn doping CdTe bulk are analyzed and compared with experimental results, showing better consistency.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Article
Physics, Multidisciplinary
K. Khallouq, R. Masrour, A. E. Maazouzi
Summary: In this study, the magnetic properties and magnetocaloric effect of HgCr2Se4 and CdCr2Se4 were investigated using Monte Carlo simulations with Metropolis algorithm. Transition temperatures for both systems under various magnetic fields were identified, and the internal energy, specific heat, and magnetic susceptibilities were determined. The magnetic entropy changes and relative cooling power were also calculated, showing an increase in the maximum values with higher magnetic fields. Hysteresis cycles of both compounds were obtained.
INDIAN JOURNAL OF PHYSICS
(2023)
Article
Materials Science, Ceramics
R. Masrour, G. Kadim, M. Ellouze
Summary: This study investigates the magnetic, electronic, structural, thermoelectric properties and magnetocaloric effect of Pr0.7Ba0.3MnO3 perovskite through experimental, DFT calculation and Monte Carlo simulations. The results show that the system has a half-metallic ground state and exhibits ferromagnetic behavior. The system also shows promising potential for magnetic refrigeration due to its relatively large values of magnetic entropy change and relative cooling power.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Article
Physics, Applied
Y. El Krimi, R. Masrour
Summary: We present a study on the structural, electronic, magnetic, elastic and transport properties of tetragonal Mn2PtSn (MPS) bulk material in stannite (ST) phase. The calculations are based on the FP-LAPW method using DFT under GGA, TB-mBJ and GGA+U as implemented in the WIEN2k code. The results show that Mn2PtSn has inverse tetragonal crystal structures with ferromagnetic spin order at zero temperature. The elastic stability criterion confirms the mechanical stability of the MPS crystal. The study also suggests the potential thermoelectric applications of MPS at high temperatures. Based on our knowledge, this ternary alloy shows advantages for materials used in spintronic devices.
MODERN PHYSICS LETTERS B
(2023)
Article
Physics, Applied
Y. El Krimi, R. Masrour
Summary: In this study, the properties of Heusler Mn2NiAl compound were investigated using various computational methods. It was found that MNA exhibits metallic, half-metallic, and magnetic behavior, and possesses mechanically stable characteristics.
MODERN PHYSICS LETTERS B
(2023)
Article
Materials Science, Ceramics
I. Ait Elkoua, R. Masrour
Summary: In this paper, the structural, electronic, magnetic, thermal, and thermoelectric properties of the complex quadruple perovskite CdCu3Fe4O12 were studied using the functional density theory method with GGA and GGA + U approximations. The magnetic state between Cu and Fe was found to be anti-ferromagnetic, while Cu-Cu and Fe-Fe were ferromagnetic, resulting in the most stable ferrimagnetic phase. The CdCu3Fe4O12 quadruple perovskite exhibited semi-metallic behavior with a gap of 0.22 eV and medium polarization of spins according to the GGA approximation. The thermal and thermoelectric properties of the compound at room temperature were measured, showing a high Seebeck coefficient, electrical conductivity, heat capacity, and power factor.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Article
Physics, Multidisciplinary
S. Belhamra, R. Masrour, A. Jabar, E. K. Hlil
Summary: Recent experimental studies have reported the existence of a gapless quantum spin liquid phase in the stratified triangular system Sr3CuSb2O9, which has been extensively investigated. Density functional theory was used to determine the exchange interactions between magnetic atoms in the same and different planes. These findings were further used in a Monte Carlo study to investigate the magnetic and thermodynamic properties of spin-1/2. The results revealed the presence of superparamagnetic, ferromagnetic, and paramagnetic phases, and identified potential applications of these novel magnetic materials in nanoelectronic devices, magnetic sensors, and flexible magnets.
INDIAN JOURNAL OF PHYSICS
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
