Article
Chemistry, Physical
L. H. Nguyen, N. T. Dang, N. Dang, L. Bau, P. H. Nam, L. T. H. Phong, D. H. Manh, P. T. Phong
Summary: The substitution of Ti at the Mn site in La0.7Ba0.3Mn1-xTixO3 samples has been found to affect the structural, magnetic, and electrical properties, leading to a decrease in Tc and tuning of the electrical transport behavior. Metal-insulator transition is observed in specific samples, while a rapid decrease in T-C is attributed to non-ferromagnetic Ti ions weakening the double-exchange interaction. Various conduction models were used to analyze the electrical resistivity data in metallic and insulating regions of the samples. The study provides insights into the electronic transport nature in La0.7Ba0.3Mn1-xTixO3 materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Chen Zhu, Jian Zhang, Hongwei Ming, Lulu Huang, Yuanyue Li, Tao Chen, Di Li, Baoli Zhang, Jingtao Xu, Xiaoying Qin
Summary: The study utilized Bi doping and Cu1.75Te nanophase to enhance the thermoelectric properties of PbTe materials, resulting in n-type PbTe materials with high ZT values at lower temperatures and maintaining high ZT values over a broad temperature range.
JOURNAL OF MATERIOMICS
(2021)
Article
Materials Science, Multidisciplinary
Raju K. Biswas, Paramita Banerjee, Swapan K. Pati
Summary: In this study, the effect of 3d-transition metal (TM) doping on the electrical and thermal transport properties of 2D SnTe is investigated. The results show that V and Mn doped SnTe exhibit improved thermoelectric performance, with Mn-doped SnTe achieving a high zT value at 900K.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Thermodynamics
Hiral D. Shah, J. A. Bhalodia
Summary: The addition of ZnO into LSMCO lowers the metal-insulator transition temperature, and high field magnetoresistance has been observed in the composite sample (x = 0.04) around room temperature. Additionally, saturation of magnetization decreases in the ZnO added LSMCO sample in the magnetic study.
Article
Chemistry, Physical
Ashutosh Kumar, Preeti Bhumla, Taras Parashchuk, Stanislaw Baran, Saswata Bhattacharya, Krzysztof T. Wojciechowski
Summary: GeTe, as a promising lead-free mid-temperature-range thermoelectric material, shows improved energy conversion efficiency with Mn-Sb co-doping. The optimized Seebeck coefficient and electrical conductivity contribute to an enhanced power factor, while the reduction in lattice thermal conductivity leads to a maximum figure-of-merit of 1.67 at 773 K.
CHEMISTRY OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Md Kashif Shamim, Anand Ranjan, Santosh Kumar, Shekhar Kumar, Seema Sharma
Summary: Lead-free polycrystalline 0.75 BiFe 1-xMn xO3-0.25BaTiO3 (x = 0.00, 0.01, 0.02 and 0.03) ceramics were synthesized via high temperature solid state reaction technique. Mn doping was found to affect the structure, ferroelectric and magnetic behavior of the BF-BT ceramics. The study revealed that the crystal structure remained unchanged with increasing Mn concentration. The average crystallite size increased with Mn concentration. The ferroelectric polarization decreased, while leakage current density increased with increasing Mn concentration. The presence of multivalence states of Fe/Mn/Ti resulted in lattice distortion and significantly affected the magnetic behavior of the ceramics.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Rajan Biswas, Satish Vitta, Titas Dasgupta
Summary: ZnSb is a promising thermoelectric material with potential applications. This study aims to improve the thermoelectric performance by reducing the lattice thermal conductivity and introducing excess zinc phases. The co-doping technique and excess zinc incorporation were found to enhance the thermoelectric properties, while grain-size reduction in the submicron range did not effectively reduce heat conduction in ZnSb.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Materials Science, Multidisciplinary
Khusboo Agrawal, Banarji Behera, S. C. Sahoo, S. K. Rout, Ashok Kumar, Piyush R. Das
Summary: The GaFeO3 and doped samples were synthesized by ceramic method and investigated for their structural, microstructural, electrical, and multiferroic properties. The doped samples showed significantly improved dielectric and ferroelectric properties, with the presence of a non-Debye type of relaxation.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Physical
Niels Kubitza, Ruiwen Xie, Ivan Tarasov, Chen Shen, Hongbin Zhang, Ulf Wiedwald, Christina S. Birkel
Summary: It is difficult to synthesize MAX phases with long-range magnetic order in the bulk. Chromium and manganese are the last transition metals that form stable full and doped MAX phases, respectively. An iron-based bulk MAX phase does not exist. Therefore, alternative strategies are needed to induce long-range magnetic ordering in bulk MAX phases to develop new functional materials. In this study, a previously unknown MAX phase solid-solution (V1-x Crx)(2)GaC was synthesized using microwave heating. The solid-solution exhibits different magnetic properties depending on the composition, with the maximum susceptibility observed at x = 0.80. This research provides valuable insights into the relationship between chemical composition, electronic structure, and bulk magnetic properties, offering important guidelines for producing long-range ordered magnetic MAX phases.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Niels Kubitza, Ruiwen Xie, Ivan Tarasov, Chen Shen, Hongbin Zhang, Ulf Wiedwald, Christina S. Birkel
Summary: By microwave heating, we have successfully synthesized a previously unknown MAX phase solid-solution (V1-x Cr x )(2)GaC, which exhibits a crucial coupling between chemical composition and electronic structure, providing important guidelines for the synthesis of long-range ordered magnetic MAX phases.
CHEMISTRY OF MATERIALS
(2023)
Article
Crystallography
Shu Aikawa, Masaki Yumoto, Tomohiko Saitoh, Satoshi Wada
Summary: The research team developed a tunable mid-IR laser using Cr:ZnSe and Cr:CdSe as laser media to access the mid-infrared region. By using a Q-switched Tm:YAG laser as a pump source, they achieved a wide tuning range and high pulse energy at different wavelengths.
JOURNAL OF CRYSTAL GROWTH
(2021)
Article
Chemistry, Physical
Aiyeshah Alhodaib
Summary: The electronic, mechanical, and transport properties of In-substituted GaAs were investigated using the TB-mBJ potential, BoltzTraP code, and Charpin tensor matrix analysis. The study showed that increasing the In concentration led to changes in directional symmetry, reduced bandgap, decreased electrical conductivity, and increased Seebeck coefficient. Additionally, the elastic moduli and thermal conductivity decreased as well.
Article
Physics, Applied
Mingjing Tang, Juan Li, Yadong Wang, Houjun Gong, Yanping Huang, Bin Kang, Kun Zhang, Ran Ang
Summary: The new material Ag0.97CrSe2(Cr2/3Te)(x) combines optimized carrier concentration and low lattice thermal conductivity, achieving a zT value of 0.6 at 650 K, surpassing other reported AgCrSe2 systems, demonstrating excellent thermoelectric potential.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
P. D. Thang, N. H. Tiep, T. A. Ho, N. D. Co, N. T. M. Hong, Q. Dong, B. W. Lee, T. L. Phan, N. T. Dang, D. T. Khan, D. S. Yang
Summary: The study systematically investigated the crystal and electronic structures, magnetic, and electrical polarization properties of polycrystalline Ba0.95Y0.05Fe12-xMnxO19 compounds with x = 0-2. The results showed changes in lattice constants, magnetization, coercive force, and electrical properties with increasing Mn content, indicating a close relationship between the chemical composition and the material properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Maryam Sajedi, Chen Luo, Konrad Siemensmeyer, Maxim Krivenkov, Kai Chen, James M. Taylor, Marion A. Flatken, Florin Radu, Oliver Rader
Summary: Lead halide perovskites are new key materials with various applications. Recent reports suggest that doping with Mn can lead to ferromagnetism, but our study shows that significant double exchange and ferromagnetism do not occur in Mn-doped lead halide perovskite thin films. Our results indicate that Mn is not suitable for creating ferromagnetism in lead halide perovskites.
COMMUNICATIONS PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yanan Huang, Jianguo Si, Shuai Lin, Hongyan Lv, Wenhai Song, Ranran Zhang, Xuan Luo, Wenjian Lu, Xuebin Zhu, Yuping Sun
Summary: This study reports the colossal 3D electrical anisotropy of layered MAB-phase MoAlB single crystal. Through experimental and theoretical investigations, it is demonstrated that the crystal structure, chemical bond, phonon vibration, and electronic structure of MoAlB result in its significant electrical conductivity anisotropy. This work provides valuable insights for the design of functional electronic devices and the synthesis of new 2D materials.
Article
Multidisciplinary Sciences
Jianchao Lin, Peng Tong, Kai Zhang, Kun Tao, Wenjian Lu, Xianlong Wang, Xuekai Zhang, Wenhai Song, Yuping Sun
Summary: Emerging caloric cooling technology provides a green alternative to conventional vapor-compression technology. This study reports the barocaloric effect associated with liquid-solid transition in n-alkanes, showing that applying pressure to the liquid state can induce a colossal BC effect.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Hongyang Ma, Bangchuan Zhao, Jin Bai, Peiyao Wang, Wanyun Li, Yunjie Mao, Xiaoguang Zhu, Zhigao Sheng, Xuebin Zhu, Yuping Sun
Summary: As a promising cathode material for sodium-ion batteries, Na3V2(PO4)(3) (NVP) has attracted extensive attention due to its high stability and fast Na+ ion diffusion. However, the reversible capacity based on the two-electron reaction mechanism is unsatisfactory due to the inactive M1 lattice sites during the insertion/extraction process. In this study, self-supporting 3D porous NVP materials with different crystallinity were fabricated on carbon foam substrates using a facile electrostatic spray deposition method. By tuning the crystallinity, the V5+/V4+ redox couple was effectively activated and three-electron reactions for sodium storage were achieved in NVP. An ultra-high specific capacity of 179.6 mAh g(-1) at 0.2 C was achieved in a disordered NVP sample due to the coexistence of redox reactions from V4+/V3+ and V5+/V4+ couples. Additionally, a pseudocapacitive charge storage mechanism induced by the disordered structure was observed in the NVP electrode. An innovative model was proposed to understand this disorder-induced pseudocapacitance phenomenon in the polyanion cathode material.
Article
Physics, Applied
Linlin An, Jianguo Si, Xiangde Zhu, Chuanying Xi, Nanyang Xu, Yuanjun Yang, Lan Wang, Wei Ning, Wenjian Lu, Mingliang Tian
Summary: We report experimental studies on the angular-dependent magnetoresistance (MR) of In3Rh single crystals under high magnetic fields. The crystals exhibit large, non-saturating linear MR and remarkable quantum oscillations with multi-frequencies. Analysis of the quantum oscillations reveals the presence of three bands hosting a nontrivial Berry phase, which is supported by first-principles calculations. Our work provides a platform for exploring topological materials in indium-rich transition metal compounds.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Xin Liang, Ding-Fu Shao, Run Lv, Rui-Chun Xiao, Hong-Yan Lv, Wen-Jian Lu, Yu-Ping Sun
Summary: Based on symmetry analyses and first-principles calculations, the predictions of topological fermions and superconductivity in Ni-intercalated transition metal chalcogenide NiTe are reported. The self-intercalation of Ni introduces nonsymmorphic symmetry operations, protecting a pair of Dirac points and three intersecting Dirac nodal lines near Fermi energy level (EF), which generate spin-textured surface states across EF. Moreover, the Ni-intercalation strongly enhances electron-phonon coupling in NiTe and makes it an anisotropic Bardeen-Cooper-Schrieffer superconductor with a full superconducting gap and a critical temperature Tc similar to 1.5 K. The coexistence of topological surface states and superconductivity implies that NiTe is a potential material platform for exploring topological superconductivity.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Tengfei Cao, Ding-Fu Shao, Kai Huang, Gautam Gurung, Evgeny Y. Tsymbal
Summary: Based on symmetry analyses and density-functional calculations, this study explores the emergence of the anomalous Hall effect (AHE) in antiferromagnetic MnBi2Te4 films assembled by polar layer stacking. Breaking PT symmetry in an MnBi2Te4 bilayer produces a magnetoelectric effect and a spontaneous AHE switchable by electric polarization. Reversible polarization at one of the interfaces in a three-layer MnBi2Te4 film drives a metal-insulator transition, as well as switching between the AHE and quantum AHE (QAHE). Engineering interlayer polarization in a three-layer MnBi2Te4 film allows converting MnBi2Te4 from a trivial insulator to a Chern insulator.
Article
Chemistry, Physical
D. C. Mahendra, Ding-Fu Shao, Vincent D. -H. Hou, Arturas Vailionis, P. Quarterman, Ali Habiboglu, M. B. Venuti, Fen Xue, Yen-Lin Huang, Chien-Min Lee, Masashi Miura, Brian Kirby, Chong Bi, Xiang Li, Yong Deng, Shy-Jay Lin, Wilman Tsai, Serena Eley, Wei-Gang Wang, Julie A. Borchers, Evgeny Y. Tsymbal, Shan X. Wang
Summary: By utilizing unconventional spins generated in a MnPd3 thin film grown on an oxidized silicon substrate, the authors observed both conventional spin-orbit torques and unconventional out-of-plane and in-plane anti-damping-like torques in MnPd3/CoFeB heterostructures, enabling complete field-free switching of perpendicular cobalt. These unconventional torques are attributed to the low symmetry of the (114)-oriented MnPd3 films. The results provide a path towards practical spin channels in ultrafast magnetic memory and logic devices.
Article
Physics, Multidisciplinary
Ding-Fu Shao, Yuan-Yuan Jiang, Jun Ding, Shu-Hui Zhang, Zi-An Wang, Rui-Chun Xiao, Gautam Gurung, W. J. Lu, Y. P. Sun, Evgeny Y. Tsymbal
Summary: It is demonstrated that fully compensated antiferromagnets can support Néel spin currents, which can be used to drive spin-dependent transport phenomena in antiferromagnetic tunnel junctions (AFMTJs). The study uncovers the potential of fully compensated antiferromagnets and opens a new route for efficient information writing and reading in antiferromagnetic spintronics.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yunjie Mao, Bangchuan Zhao, Jin Bai, Hongyang Ma, Peiyao Wang, Wanyun Li, Ke Xiao, Siya Wang, Xuebin Zhu, Yuping Sun
Summary: As a new generation of energy storage systems, flexible batteries can expand the application scope and area of energy storage devices. Flexibility and energy density are the two key evaluation parameters for flexible batteries. In this study, a flexible VS2@CF material was fabricated by growing VS2 nanosheets on carbon foam, and it showed excellent rate capability and cycling performance when used as a cathode material for aqueous zinc-ion batteries. Moreover, the assembled quasi-solid-state battery also exhibited excellent rate capability and cycle performance, and had good flexible and self-healing properties.
Article
Materials Science, Multidisciplinary
Tengfei Cao, Guodong Ren, Ding -Fu Shao, Evgeny Y. Tsymbal, Rohan Mishra
Summary: The recent observation of ferroelectricity in binary metal oxides, such as HfO2, ZrO2, Hf0.5Zr0.5O2, and Ga2O3, has attracted much attention. Hole doping is proposed to play a key role in stabilizing polar phases in these oxides. First-principles calculations demonstrate that holes mainly occupy one of the oxygen sublattices and their localization enhances the electrostatic energy of the system, making the polar phase more stable at high concentrations. The electrostatic mechanism is responsible for the stabilization of the ferroelectric phase in HfO2 doped with elements that introduce holes to the system.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wanyun Li, Bangchuan Zhao, Jin Bai, Peiyao Wang, Yunjie Mao, Ke Xiao, Xuebin Zhu, Yuping Sun
Summary: The surface modification method via NH4H2PO4 assisted pyrolysis improves the Coulombic efficiency of Li1.2Mn0.54Ni0.13Co0.13O2 by generating appropriate oxygen vacancies, Li3PO4, and a spinel phase in the surface layer of LMR microspheres. This method effectively suppresses oxygen release and enhances lithium-ion diffusion, mitigating the dissolution of transition metal ions.
Article
Nanoscience & Nanotechnology
Peiyao Wang, Bangchuan Zhao, Jin Bai, Hongyang Ma, Wanyun Li, Yunjie Mao, Ke Xiao, Xuebin Zhu, Yuping Sun
Summary: In this study, a novel Mo2N/CoN nanotube material was synthesized, where the CoN component undergoes a conversion reaction, while Mo2N exhibits intercalation reaction feature. Moreover, the nanotube hollow structure of Mo2N/CoN provides more active sites and a short pathway for Li+ ions and electrons diffusion, as well as effectively buffering the volume change of the material. As a result, the Mo2N/CoN nanotube anode demonstrates excellent electrochemical properties.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Multidisciplinary
Yunjie Mao, Jin Bai, Shuai Lin, Peiyao Wang, Wanyun Li, Ke Xiao, Siya Wang, Xuebin Zhu, Bangchuan Zhao, Yuping Sun
Summary: In this study, a novel 3D interconnected VS2 perpendicular to V4C3Tx heterostructure material was prepared and used to improve the performance of aqueous zinc-ion batteries. The material showed high specific capacity and excellent rate capability for the cathode, while effectively suppressing zinc dendrite growth for the anode. The battery exhibited a long cycling lifespan, making it a promising candidate for large-scale energy storage applications.
Article
Multidisciplinary Sciences
Cuimei Cao, Shiwei Chen, Rui-Chun Xiao, Zengtai Zhu, Guoqiang Yu, Yangping Wang, Xuepeng Qiu, Liang Liu, Tieyang Zhao, Ding-Fu Shao, Yang Xu, Jingsheng Chen, Qingfeng Zhan
Summary: Cubic materials are not expected to exhibit anisotropy in transport phenomena, but we report an anomalous anisotropy of spin current in the (001) film of the noncollinear antiferromagnetic spin source Mn3Pt. This anisotropy originates from the intertwined time reversal-odd and time reversal-even spin Hall effects. By analyzing the symmetry and characterizing the current-induced spin torques in Mn3Pt-based heterostructures, we find that the spin current in Mn3Pt (001) exhibits exotic dependencies on the current direction for all spin components, deviating from that in conventional cubic systems.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Jiafeng Zhou, Jin Bai, Yunjie Mao, Hongyang Ma, Xuebin Zhu, Bangchuan Zhao, Yuping Sun
Summary: Yolk-shell Co3V2O8 microspheres with abundant mesopores are fabricated through the magneto-solvothermal method followed by a proper heat-treatment process, resulting in a unique structure that enables excellent lithium-ion storage performance. The applied magnetic field in the solvothermal process reduces surface energy and promotes the growth of Co3V2O8 particles, forming the yolk-shell architecture. The material possesses a higher surface area, more sufficient void space, and shorter ion/electron transport distance, facilitating charge transfer and accommodating volume change during charge/discharge.
NEW JOURNAL OF CHEMISTRY
(2023)
