Article
Chemistry, Physical
M. Ounacer, B. Rabi, A. Essoumhi, M. Sajieddine, B. F. O. Costa, M. Emo, A. Razouk, M. Sahlaoui
Summary: The report investigates the structural and magnetic properties of Al3+ substituted cobalt ferrite nanoparticles. It demonstrates that increasing Al content significantly influences the lattice parameters and magnetic properties, leading to a decrease in grain size.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Jinglin Zhu, Shu Wang, Zhichao Yang, Bingcai Pan
Summary: This study demonstrates the use of macroporous polystyrene resin as a support to improve the stability of nanosized spinel cobalt ferrite (CoFe2O4) during peroxymonosulfate (PMS) activation for decontamination in water. The supported CoFe2O4 nanoparticles exhibit high catalytic activity and low cobalt leaching. The findings also reveal the stability of the organic resin during the non-radical process and evaluate the catalytic durability and stability of CoFe2O4 in actual wastewater.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Polymer Science
Chandra Sekhar Beera, B. Dhanalakshmi, D. Nirmala Devi, D. Vijayalakshmi, Akanksha Mishra, S. Ramesh, B. Parvatheeswara Rao, P. Shyamala, Melita Menelaou, Nadyah Alanazi, Abdullah N. Alodhayb
Summary: Chromium-doped cobalt ferrite nanoparticles were synthesized and their magnetic properties were studied, showing that the introduction of chromium led to changes in the material's magnetic properties.
Article
Chemistry, Multidisciplinary
Venkatesha Narayanaswamy, Imaddin A. Al-Omari, Aleksandr S. Kamzin, Bashar Issa, Huseyin O. Tekin, Hafsa Khourshid, Hemant Kumar, Ambresh Mallya, Sangaraju Sambasivam, Ihab M. Obaidat
Summary: Mixed ferrite nanoparticles with varying compositions were synthesized and characterized for their structure, morphology, and magnetic properties. The results showed that particle size decreased with increasing composition x, exhibited significant magnetic properties, and had excellent magneto thermic heating capabilities.
Article
Materials Science, Ceramics
Somnath Sahu, Ravi Chandra Gurrala, Pamu Dobbidi
Summary: This research demonstrates the enhancement of microwave absorption capability in Gd-doped Ni0.5Co0.5Fe2O4 nanoceramics through oxygen vacancy engineering. The study reveals that a small amount of Gd promotes high oxygen vacancy concentration, appropriate lattice defects, and high magnetic and dielectric losses. The results also provide insights into the connection between oxygen vacancy defects and electromagnetic wave dissipation capability.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
P. N. Anantharamaiah, H. M. Shashanka, S. Saha, J. A. Chelvane, B. Sahoo
Summary: Bismuth-substituted cobalt ferrite samples with enhanced magnetostriction were successfully synthesized using a glycine-nitrate based auto-combustion route. The presence of Bi3+ promoted significant grain growth and increased strain sensitivity at lower magnetic fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
I. S. B. Ferraz, T. J. Castro, J. Mantilla, J. A. H. Coaquira, V. K. Garg, A. C. Oliveira, A. Franco Jr, P. C. Morais, S. W. da Silva
Summary: Aluminum-substituted cobalt ferrite nanoparticles synthesized by combustion reaction method exhibit excellent structural and property characteristics, making them promising candidates for applications in stress sensors, actuators, and magnetostrictive filters.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Chemical
Yuhang Zhang, Jin Qian, Peifang Wang, Yuxuan He, Bianhe Lu, Sijing Tang, Kailin Xu
Summary: In this study, ternary magnetic nanocomposites (SrTiO3/CoFe2O4/rGO, SCG) doped with cobalt ferrite and loaded with rGO were synthesized and used for rapid activation of PMS to degrade LVF. SCG-1 (1% wt rGO loading) showed the highest catalytic activity, with a degradation efficiency of 87.4% in 5 minutes. The main active substances involved in LVF degradation were identified as SO4 center dot-, O-1(2), and (OH)-O-center dot through quench experiments and EPR analysis. The vulnerability sites and degradation pathways of LVF were analyzed, and the toxicity and ecological risk of intermediate products were determined.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Marwa M. Hussein, Samia A. Saafan, H. F. Abosheiasha, Di Zhou, D. S. Klygach, M. G. Vakhitov, S. V. Trukhanov, A. V. Trukhanov, T. I. Zubar, K. A. Astapovich, Hesham M. H. Zakaly, Moustafa A. Darwish
Summary: Nanosized spinel ferrites Co1-xNixFe2O4 (where x = 0.0-1.0), or CNFO, were produced via a chemical method. X-ray diffraction (XRD) was used to determine the crystal structure's characteristics. It was found that all samples had a single phase with cubic syngony (space group Fd3m). The lattice parameter and unit cell volume were found to correlate with the ionic radii and coordination numbers of Co2+ and Ni2+ ions, with an increase in Ni2+ content leading to a decrease in lattice parameter and unit cell volume.
Article
Physics, Applied
Guoliang Yu, Xiaofei Xu, Yang Qiu, Han Yang, Mingmin Zhu, Haomiao Zhou
Summary: This work reports investigations on strain-modulated magnetization precession in the breathing mode skyrmion-based spin transfer nano-oscillator, showing that the strain-modulated skyrmion breathing frequency can be strongly controlled by biaxial-isotropy in-plane strain. This tunability offers a promising way to design future tunable spin transfer nano-oscillators based on skyrmion for better performance in wireless communication.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Mphoma S. Matseke, Haitao Zheng, Mkhulu K. Mathe, Emanuela Carleschi, Bryan Doyle
Summary: In this study, Co-doped MnFe2O4 electrocatalysts were found to have improved oxygen reduction reaction (ORR) performance, with MnFe1.5Co0.5O4/C electrocatalyst showing the best results. The Co doping resulted in smaller and more uniform particle sizes, more oxygen vacancies, enriched surface Mn3+ ions, and improved conductivity, all contributing to enhanced ORR activity compared to pristine MnFe2O4/C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
H. M. Shashanka, P. N. Anantharamaiah
Summary: This study investigates the magnetostrictive characteristics of sintered CoFe2O4 (CFO), Co0.85Ni0.15Fe1.85Ga0.15O4 (CNFGO15), and Co0.85Mg0.15Fe1.85Ga0.15O4 (CMFGO15) ceramics. The CMFGO15 sample exhibits enhanced strain sensitivity at low magnetic fields compared to the other two samples, with a maximum strain sensitivity nearly 160% higher than the values found for the other two samples even at remarkable low field.
SOLID STATE SCIENCES
(2023)
Article
Engineering, Electrical & Electronic
Burak Kivrak, Semiramis Gulkesen, Ali Osman Ayas, Mustafa Akyol, Ahmet Ekicibil
Summary: The study investigated the structural, magnetic, and magnetocaloric properties of Ho-substituted Co(CrFe)O-4 spinel compounds, finding that the Ho3+ ions form a new phase in the lattice and affect the paramagnetic to ferro-/ferrimagnetic phase transition temperature and magnetic entropy change. The average particle size of samples also increases with Ho content.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
K. Venkata Siva, Amritesh Kumar, J. Arout Chelvane, A. Arockiarajan
Summary: This study investigates the magnetostrictive properties of cobalt ferrite by substituting ions. The results demonstrate the significance of doping transition metal ions in enhancing the magnetostrictive characteristics.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Molongnenla Jamir, C. Borgohain, J. P. Borah
Summary: This study investigated the substitution of copper with CoFe2O4 nanoparticles and the coating of chitosan to enhance their efficiency for hyperthermia treatment. The results showed the emergence of well-crystalline structures and the presence of chitosan coating on the nanoparticle surface. The nanoparticles exhibited magnetic characteristics that varied with Cu+2 doping concentration, and the self-heating characteristics indicated a decrease in specific absorption rate as concentration increases. Notably, the chitosan coating at x = 0.37 nanoparticles showed the best performance for magnetic hyperthermia therapy.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Suman, Surjeet Chahal, Saurabh Singh, Pratibha Goel, Ashok Kumar, Ompal Singh, Parmod Kumar
Summary: Ni-doped hematite alpha-Fe2-xNixO3 nanostructures were synthesized and showed optimal performance at x=0.04 Ni concentration with up to 80% degradation of rose bengal dye achieved. This indicates the potential use of Ni-doped alpha-Fe2O3 in water purification against harmful dyes.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Materials Science, Ceramics
Surjeet Chahal, Lakshita Phor, Saurabh Singh, Amanvir Singh, Jaideep Malik, Pratibha Goel, Ashok Kumar, Suresh Kumar, Ankita, Parmod Kumar
Summary: This study synthesized unique nanorods of cerium oxide and found that they exhibit effective degradation of p-Nitrophenol. The research also discovered the dual functionality of magnesium-doped cerium oxide in spintronics and photocatalysis.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Rohit Ranga, Krishan Kumar, Ashok Kumar
Summary: Lanthanum doped magnesium-zinc spinel ferrite samples were synthesized by the co-precipitation method. The effects of La3+ ion doping on crystallite size and lattice parameter were discussed. The samples showed a crystallite size range of 7-12 nm, percentage porosity range of 49-50%, and percentage crystallinity range of 80-85%. FTIR spectra shift to higher region with La3+ ion doping. EDS analysis confirmed the absence of impurities except carbon. EPR analysis showed a decrease in g-value and a shift in resonance field for the synthesized samples. The synthesized samples exhibited superparamagnetic nature and low coercive field value, making them suitable for ferrofluids and hyperthermia treatment applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Rohit Ranga, Krishan Kumar, Ashok Kumar
Summary: This study successfully synthesized Ce3+ ion doped MZP ferrite nanoparticles using co-precipitation process. XRD and FTIR analysis confirmed the single-phase spinel structure of the samples. TEM and FE-SEM observations revealed the porous morphology and spherical shape of the nanoparticles. The doped samples exhibited some special physical properties, such as changes in dielectric value and magnetic characteristics.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Review
Materials Science, Multidisciplinary
Harita Sonia, Harita Kumari, Seema Suman, Surjeet Chahal, Seema Devi, Suresh Kumar, Sandeep Kumar, Parmod Kumar, Ashok Kumar
Summary: This paper comprehensively reviews the research interest in MFe2O4 and its nanocomposites with specific metal oxides (ZnO, TiO2, CeO2) for decontamination of wastewater using photocatalysts. The stable and easily separable magnetic behavior of MFe2O4 nanoparticles make them attractive for this application. The paper discusses the advantageous pathway for the generation of free radicals with the help of MFe2O4-based nanocomposites as photocatalysts.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Inorganic & Nuclear
Vasundhara Madaan, Brij Mohan, Vinita Bhankar, Rohit Ranga, Parveen Kumari, Permender Singh, Mika Sillanpaa, Ashok Kumar, Alexander A. Solovev, Krishan Kumar
Summary: Metal-doped CeO2-based nanomaterials show promising applications in the photocatalytic degradation of organic waste in water. The unique properties of metal-doped CeO2, such as its characteristic bandgap, oxygen vacancies, and surface-active cationic sites, play an important role in organic waste degradation. The synthesis routes and conditions, reaction temperature, concentration, nature and annealing temperature of the doping ions, and surface morphology also affect the photocatalytic degradation process. Challenges and prospects for the development of metal-doped CeO2 as a photocatalyst with precise morphology and synthesis routes are discussed.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Seema Devi, Saurabh Suman, Surjeet Chahal, Saurabh Singh, Sandeep Ankita, Parmod Kumar, Sandeep Kumar, Ashok Kumar, Vinod Kumar
Summary: Hybrid nanocomposite materials consisting of multi walled carbon nanotubes (MWCNT) and hematite (a-Fe2O3) were developed for wastewater treatment through photocatalysis. The nanocomposites were prepared using a sonication method and characterized using various techniques. The 10% a-Fe2O3/CNT nanocomposites exhibited higher photocatalytic activity with 87% degradation of Rose Bengal dye in 90 minutes. The enhanced activity was attributed to the synergistic effects of a-Fe2O3 and CNTs, which reduced charge carrier recombination and promoted the formation of highly active radical species on the CNT surface. This research is significant for understanding the photocatalytic mechanism and developing efficient photocatalysts for organic pollutant degradation.
CERAMICS INTERNATIONAL
(2023)
Review
Environmental Sciences
Harita Kumari, Sonia, Surjeet Suman, Rohit Ranga, Surjeet Chahal, Seema Devi, Sourabh Sharma, Sandeep Kumar, Parmod Kumar, Suresh Kumar, Ashok Kumar, Rajesh Parmar
Summary: Water pollution is a global issue caused by rapid industrialization and urbanization. Metal oxide-based semiconductors have been explored as photocatalysts to degrade organic pollutants in wastewater, but their performance is limited. Strategies such as doping, nanocomposite formation, and core-shell nanostructures have been discussed to improve their photocatalytic activity. Rare-earth doped metal oxides show advantages in interacting with functional groups quickly. This review article focuses on synthesizing rare earth doped metal oxides and nanocomposites, their efficiency in degrading organic pollutants, and potential industrial applications.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Materials Science, Ceramics
Rohit Ranga, Krishan Kumar, Ashok Kumar
Summary: A series of La3+ ion doped magnesium nickel ferrites were prepared and characterized for their structural and magnetic properties. The doping of La3+ ions resulted in a decrease in crystallite size, an increase in lattice parameter, and changes in magnetic properties. Additionally, the frequency and temperature variations affected the dielectric properties of the material.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Sonia, Ashok Kumar, Parmod Kumar
Summary: Cobalt ferrite/cerium oxide nanocomposites with varying weight ratios were synthesized and investigated for the removal of Rose Bengal dye by photocatalytic activity. The results showed that increasing the content of cerium oxide led to the creation of oxygen vacancies and photoinduced electrons and holes, resulting in enhanced photocatalytic activity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Harita Kumari, Surjeet Sonia, Surjeet Chahal, Ashok Suman, Parmod Kumar, Ashok Kumar, Rajesh Parmar
Summary: Scientists and citizens are concerned about the presence of organic pollutants in water bodies, especially phenolic compounds, organic dyes, and antibiotics. This study synthesized Ce-doped SnO2 samples and found that they exhibited a single phase crystalline nature. The incorporation of Ce resulted in improved ferromagnetic properties and enhanced catalytic behavior, making SnO2 a useful material for spintronic devices and the degradation of organic dyes.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Surjeet Ankita, Surjeet Chahal, Saurabh Singh, Ashok Suman, K. Kanishka H. De Silva, Ashok Kumar, Sandeep Kumar, Lalit Kumar, Masamichi Yoshimura, Ravi Kumar, Parmod Kumar
Summary: The present work focuses on refining the magnetic and photocatalytic properties of three samples of cerium oxide nano/micro-sized particles synthesized by different chemical routes. X-ray diffraction measurements reveal the growth of a single phase cubic fluorite structure of pure CeO2 with a space group of Fm3m. The synthesis route significantly alters the morphology and particle size, as observed by high resolution transmission electron microscopy. Raman spectra and XPS confirm the presence of oxygen vacancies defects in the CeO2 matrix. In this study, the magnetic properties and photocatalytic activity of rose Bengal dye under UV light were investigated. Room temperature ferromagnetism was observed for SG, CO, and HB samples, with small magnetizations of 2.21, 16.8, and 3.58 emu/g x 10-4, respectively. The photocatalytic efficiency of the CO sample was 76.3% for the degradation of rose Bengal dye under UV illumination for 140 minutes. Therefore, the morphology-dependent enhanced ferromagnetic and superior photocatalytic behavior of CeO2 make it a multifunctional material for use as a photocatalyst for organic dye decomposition and in spintronics devices.
Article
Engineering, Multidisciplinary
Geeta Arora, Rajendra Pant, Homan Emaifar, Masoumeh Khademi
Summary: The relaxation oscillator is an oscillator that returns to equilibrium after being disturbed. This study solves the relaxation-oscillation equation using the residual power series method, which proves to be more reliable and accurate than other methods. The reliability and efficiency of this method are demonstrated through examples and error comparisons. The pseudocode of the method is also discussed briefly. This method can be used to solve fractional order differential equations.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Surjeet Chahal, Lakshita Phor, Ashok Kumar, Suresh Kumar, Sandeep Kumar, Ravi Kumar, Parmod Kumar
Summary: This article presents the synthesis of cerium oxide (CeO2) nanoparticles using a sol-gel method, followed by their decoration on multi-walled carbon nanotubes (CNTs) and graphene oxide (GO) to create binary and ternary hybrid nanocomposites via ultrasonic treatment. The presence of oxygen vacancy defects enhances the photocatalytic efficiency as observed using X-ray photoelectron spectroscopy (XPS). The ternary hybrid nanocomposites (CeO2/CNT/GO) exhibit excellent photocatalytic efficiency with a degradation rate of rose bengal (RB) dye up to 96.9% in 50 minutes. CNTs and GO facilitate interfacial charge transfer, thereby reducing electron-hole pair recombination. These findings suggest that these composites show great promise for the degradation of harmful organic pollutants in wastewater treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Suman, Saurabh Singh, Ankita, Ashok Kumar, Navish Kataria, Sandeep Kumar, Parmod Kumar
Summary: This study successfully synthesized α-Fe2O3@CeO2 and CeO2@α-Fe2O3 core-shell nanoparticles for the first time using a hydrothermal method. Characterization was done using XRD patterns and XPS spectra, revealing the magnetic properties and defects/vacancies in lattice. The core-shell nanoparticles showed higher magnetic character for pure Fe2O3 and higher photodegradation efficiency compared to single metal oxides.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Bibhutibhusan Nayak, S. Narayana Jammalamadaka
Summary: This article presents a method for remote detection of bovine serum albumin (BSA) using modified cantilever beam magnetometry (CBM). By combining a magnetostrictive Fe70Ga30 cantilever with optical detection technique, researchers were able to detect high concentrations of BSA remotely. The results of this study demonstrate the potential of this method in estimating the magnetostriction of thin films.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yu Hao, R. E. Camley, Z. Celinski
Summary: Magnetic particles have various applications and their magnetic state is determined by their size and the strength of an applied magnetic field. Numerical simulations were performed to study the effect of an applied field on the critical size of single-domain magnetic particles, and the critical field at which a particle becomes single-domain was determined.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Nitesh Singh, Naresh Kumar, Dharohar Sahadot, Anil Annadi, Vidyadhar Singh, Murtaza Bohra
Summary: The unique magnetic properties of FM/AFM and hard-FM/soft-FM nanocomposite thin films have significant relevance for numerous applications. The composition and performance of different magnetic phases in the nanocomposite films can be significantly affected by the laser ablation conditions and annealing temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alya Ali Musaed, Samir Salem Al-Bawri, Khaled Aljaloud, Wazie M. Abdulkawi, Mohammad Tariqul Islam, Mandeep Jit Singh, Zaini Sakawi, Husam Hamid Ibrahim
Summary: This research presents a wideband tunable metamaterial for body-centric applications in the millimeter-wave frequency band. The proposed metamaterial has a wide operating frequency range and enhanced gain, making it suitable for improving the antenna performance in 5G wireless communication systems.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Binod K. Rai, Boris Maiorov, Krzysztof Gofryk, Patrick O'Rourke, Catherine Housley, Henry Ajo, Asraf Sawon, Arjun K. Pathak, Narayan Poudel, Qiang Zhang, Travis J. Williams, Matthias Frontzek
Summary: This manuscript reports on the structural and magnetic properties of NdCuGa3. The study confirmed the crystal structure and magnetic phase transition of NdCuGa3 using XRD, neutron diffraction, magnetization, and specific heat measurements. The neutron diffraction data further confirmed the antiferromagnetic phase of NdCuGa3.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Haonan Li, Cong Li, Hailiang Huang, Guodong Hao, Fei Wang
Summary: The electronic structure and ferroelectric-ferromagnetic coupling properties of Y-doped and vacancy-containing GaN-ZnO heterojunctions are systematically investigated. The magnetism in vacancy-containing systems is generated by the spin polarization of unpaired electrons induced by cationic vacancies, while in Y-doped systems, bound magnetic polarons are formed by the orbital hybridization of s-state and d-state electrons of Y-doped elements.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Muhammad Ijaz, Hafeez Ullah, Bandar Ali Al-Asbahi, Mati Ullah Khan, Zaheer Abbas, Sana Ullah Asif
Summary: M-type BaFe11.4-xAlxCo0.6O19 hexaferrites with Al3+ substitutions were synthesized using the co-precipitation method followed by Sonochemical process. The synthesized materials were characterized using XRD, FTIR, UV-vis spectroscopy, VSM, SEM, and LCR meter. The results showed that aluminum doping decreased the band gap and enhanced the magnetic and dielectric properties of the hexaferrites, making them suitable for various applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg I. Utesov
Summary: The elementary excitations spectrum of anisotropic frustrated antiferromagnets in the fan phase is discussed. It is found that the low-energy part of the spectrum consists of a gapless phason branch with linear dispersion and a gapped optical branch corresponding to the fan structure amplitude oscillations. In the high-energy part of the spectrum, the excitations are similar to the magnons of the fully polarized phase.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alexander Ya. Simonovskii, Alexander A. Yanovskii, Arthur R. Zakinyan
Summary: In this study, the departure frequency of vapor bubbles during boiling of ferrofluid in a horizontal magnetic field is experimentally investigated. Two methods, visual and inductive, are used to measure the frequency of bubble departure. The results show that the bubble departure frequency can decrease with increasing magnetic field strength and increase with increasing temperature of the heat-emitting surface. A linear stability analysis is conducted to analyze the influence of the magnetic field on the frequency of bubble formation during ferrofluid boiling.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg Heczko, Michal Rames, Vit Kopecky, Petr Vertat, Michal Varga, Ladislav Straka
Summary: Heusler Ni-Mn-Ga alloys are multiferroic materials that exhibit magnetic shape memory (MSM) phenomena. By doping transition elements into Ni2MnGa alloys, the transformation temperatures can be modified and complex behaviors can be observed, such as the variation in saturation magnetization and the effects of elemental substitution on compound properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Carlos Ariel Samudio Perez, Ariel Flaig de Marchi
Summary: This study investigates the electronic and magnetic properties of the Full-Heusler Fe2MnAs alloy using first-principles calculations. The alloy may form spontaneously and exhibits a ferromagnetic order and high spin-polarization. It can be transformed into a half-metal by contracting the lattice constant. Additionally, certain defects contribute to the spin-polarization of the alloy, making it a fully half-metallic material.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Satish Geeri, Aditya Kolakoti, Prasadarao Bobbili
Summary: In this study, an electromagnetic wave-absorbing material was fabricated using a polymer composite material with fiber orientation and Multiwall Carbon Nanotubes as filler materials, along with a Perfect Electric Conducting material. The experiments demonstrated strong electromagnetic absorbing properties for the composites with PEC-coated and non-PEC-coated materials. Mechanical, thermal, and morphological analysis confirmed the similar trend in properties. CRITIC analysis helped identify the sequence order of sustaining properties for the fabricated composites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yankai Chen, Ruoxue Zhang, Yukai An
Summary: The piezoelectricity, valley character, and magnetic properties of 2H-VS2 monolayer were studied, revealing its potential applications in spintronics and valleytronics due to its bipolar magnetic semiconductor characteristics and superior physical properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Leonardo S. Lima
Summary: This study investigates the thermodynamic quantities, such as entropy, specific heat, and magnetic susceptibility, in the next-nearest-neighbors Heisenberg model on a honeycomb-kagome lattice. The linear spin-wave approach is applied to obtain the temperature-dependent behavior of these quantities. Additionally, the entanglement negativity, a quantifier of quantum entanglement, and the spin Hall conductivity are also studied. The results show that all the thermodynamic quantities, as well as the entanglement negativity and spin Hall conductivity, exhibit an increasing trend with temperature. Furthermore, it is found that all the analyzed quantities approach zero in the low-temperature limit, consistent with experimental observations.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxing Wang, Maximilian Kai Reimann, Wang Chen, Yikun Zhang, Rainer Poettgen
Summary: The Mo2FeB2-type compounds RE2Ga2Mg (RE = Tm, Er, Ho) exhibit a large magnetocaloric effect, making them promising for cryogenic magnetic cooling applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
