Article
Materials Science, Multidisciplinary
Snehal Mandal, I Das
Summary: The magnetotransport properties of polycrystalline La0.7Sr0.3MnO3 (LSMO) ultrathin films can be tuned by varying film thickness and grain size. A two-step deposition method was introduced to prevent reaction of the films with SiO2 at high temperatures. The dominance of intergranular spin polarized transport (SPT) phenomena in these ultrathin films was evidenced from low field magnetoresistance at low temperatures, making them suitable for spintronic device applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Claudia Schnitter, Johanna Rosen, Hans Hogberg
Summary: Epitaxial growth of ZrB2 films on Si(100) substrates at 900 degrees C using direct-current magnetron sputter deposition from sintered ZrB2 targets is demonstrated. Two epitaxial relationships are determined from pole figure measurements, with a measure of epitaxial quality obtained from rocking curve measurements of the 100 and 102 peaks. The film composition is found to be ZrB2.3 and a previously unreported crystallographic relationship is identified.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Daniele Desideri, Enrico Bernardo, Alain Jody Corso, Federico Moro, Maria Guglielmina Pelizzo
Summary: This study achieved the realization of c-axis oriented aluminum nitride thick film on aluminum substrates through reactive magnetron sputtering. The electrical properties, including conductivity and permittivity, of the film were characterized.
Article
Materials Science, Multidisciplinary
Yu-Chang Lai, Po-Ching Wu, Tung-Han Chuang
Summary: In this study, low-temperature Ag-Ag direct bonding using high (111)-preferred orientation films with densely-packed nanotwins fabricated by magnetron sputtering process achieved great bonding interfaces with almost no voids. The high thermal stability observed, for the twin thickness remained unchanged after bonding at various temperatures, shows great potential for application in various fields.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Katarina Viskupova, Branislav Grancic, Tomas Roch, Stefan Nagy, Leonid Satrapinskyy, Viktor Sroba, Martin Truchly, Jiri Silha, Peter Kus, Marian Mikula
Summary: This study investigates thermally induced planar defects in ternary V1-xMoxB2-Delta coatings and their different influences on mechanical properties. Scanning transmission electron microscopy (STEM) was used to identify various types of planar defects. In the slightly understoichiometric V0.58Mo0.42B1.9 system, anti-phase boundary defects (APB) were observed, accompanied by chemical separation of V and Mo. This led to the formation of MoB-Cmcm orthorhombic phase without affecting mechanical properties. In the highly understoichiometric V0.37Mo0.63B1.2 coating, no chemical separation was observed, but annealing resulted in crystallization into orthorhombic Cmcm phase with twin lamellae and significant hardening.
SCRIPTA MATERIALIA
(2023)
Article
Physics, Applied
Takahide Kubota, Keita Ito, Rie Y. Umetsu, Koki Takanashi
Summary: This study investigated the potential application of a new material (Mn-Cr)AlGe in MRAMs, finding that it exhibits comparable or even higher perpendicular magnetic anisotropy energy at nanometer thicknesses compared to conventional materials, despite having lower saturation magnetization.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Xi Dong, Tuan Anh Pham, Chunqiang Xu, Yining He, Wei Lai, Xianglin Ke, Pengpeng Zhang
Summary: In this study, the growth and electronic properties of SnSe2 films on the 3 x 3 reconstructed (111)-oriented SrTiO(3) surface were investigated using scanning tunneling microscopy/spectroscopy. A coverage-dependent growth mode, which is correlated with the spatial distribution of the electronic properties of SnSe2 films, was identified. It was also demonstrated that interfacial modification using a van der Waals-layered material of low work function (1T-WSe2) effectively alters the growth and electronic structures of SnSe2.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Engineering, Electrical & Electronic
Lalit Pandey, Nakul Kumar, Nanhe Kumar Gupta, Vireshwar Mishra, Nikita Sharma, Vineet Barwal, Soumyarup Hait, Sujeet Chaudhary
Summary: We present the results of a study on the structural and magnetotransport properties of Cr-doped Bi2Te3 thin films deposited on Si(100) using the sputtering technique. Our findings suggest that Cr atoms may intercalate between the van der Waals gap of the two quintuple layers of c-axis-oriented Bi2Te3. The doping of Cr changes the temperature-dependent resistivity trend of Bi2Te3 from metallic to insulating behavior and suppresses certain effects in the magneto-transport behavior.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Applied
Alexey A. Serdobintsev, Victor V. Galushka, Ilya O. Kozhevnikov, Anton M. Pavlov, Andrey V. Starodubov
Summary: This study investigates the feasibility of depositing absorptive non-reflective thin coatings on dielectric substrates using simultaneous magnetron codeposition, focusing on the electromagnetic wave propagation in Al-Si films and the control of the co-deposition process. Graded segregation was observed in micrometer-thick films, allowing for the preparation of non-reflective and absorptive materials for operation in the V-band with significant reflection and transmission losses. The proposed qualitative model involves aluminum-induced silicon recrystallization and shows potential for practical applications in electronic devices operating in the millimeter wave band.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Chao-Chun Yen, Anoop Kumar Singh, Po-Wei Wu, Hsin-Yu Chou, Dong-Sing Wuu
Summary: The formation of native amorphous silicon oxide (SiO2) layer on Si substrate causes defects in the (3-Ga2O3 films. Using a titanium nitride (TiN) hetero-buffer layer with (111) preferred orientation can reduce the lattice mismatch between (3-Ga2O3 films and Si substrate and increase the (3-Ga2O3 orientation. The lateral Schottky barrier diode (SBD) fabricated with (3-Ga2O3/TiN/Si film demonstrates significant improvement in performance.
MATERIALS TODAY ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
J. F. McNulty, K. Temst, M. J. Van Bael, A. Vantomme, E-M Anton
Summary: The study demonstrates the growth of epitaxial SmN thin films on Si surfaces under controlled conditions, without forming silicide impurities. The low lattice mismatch of SmN with Si, in combination with the low cost and maturity of Si processing technology, offers a promising route for further research on the fundamental properties of SmN and the development of spin-transport devices.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Engineering, Chemical
Guo Zhu, Mengxin Han, Baijun Xiao, Zhiyin Gan
Summary: An integrated multiscale simulation was conducted to study the effect of sputtering pressure on the surface micro-topography of sputtered Cu/Si films. The simulation results showed that the increase in sputtering pressure led to a decrease in the proportion of deposited Cu atoms with energy ranging from 2 to 30 eV and caused a transition of the growth mode from two-dimensional layered mode to Volmer-Weber mode. Additionally, the simulation revealed that incident energy ranging from 2 to 30 eV and incident angle between 10° and 35° were conducive to the two-dimensional layered growth of sputtered Cu films.
Article
Materials Science, Multidisciplinary
A. A. Serdobintsev, V. V. Galushka, L. D. Volkovoynova, I. O. Kozhevnikov, E. S. Prikhozhdenko, D. I. Artyukhov, N. V. Gorshkov, A. M. Pavlov, A. V. Starodubov
Summary: This study reports on the effects of aluminum and silicon segregation in mu m-thick magnetron co-deposited Si-Al films. It was found that an increase in aluminum content leads to the segregation of a separate crystalline phase, accompanied by the emergence of the c-Si phase. Silicon crystallization process is controlled by the redistribution of components in the film, which can be attributed to aluminum-induced crystallization process. The redistribution of aluminum and silicon phases in the amorphous matrix can be utilized to customize the electrophysical properties of the resulting coatings for applications in mm-band RF devices.
Article
Chemistry, Physical
Sebastian M. J. Beer, Arbresha Muriqi, Patrick Lindner, Manuela Winter, Detlef Rogalla, Michael Nolan, Andreas Ney, Jorg Debus, Anjana Devi
Summary: Europium sulfide (EuS) thin films grown via chemical vapor deposition (CVD) exhibit high quality, stoichiometry, and tunability, with the advantage of avoiding the use of toxic hydrogen sulfide.
CHEMISTRY OF MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
N. Akcay, M. Tivanov, S. Ozcelik
Summary: The research reported the structural, morphological, optical, and electrical properties of molybdenum disulfide (MoS2) films grown on different substrates, showing that the films on sapphire substrates exhibited better crystallinity and a well-stacked layered structure.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yujie Zhang, Xiaodan Tang, Bingbing Cheng, Jiayun Li, Enke Liu, Xuekui Xi, Wenhong Wang, Guangheng Wu, Fanbin Meng
Summary: The magnetic properties of isomorphic heterogeneous gamma-Fe2MnGa alloys were investigated under different cooling and annealing conditions, showing a significant difference in magnetic behavior due to the disorder of atomic occupation. Rapid solidification introduces disordered atoms, leading to an antiferromagnetic phase, while annealing improves atomic order and transforms it into a ferromagnetic phase, resulting in variation of coercivity and magnetic phase transition.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
D. F. Liu, E. K. Liu, Q. N. Xu, J. L. Shen, Y. W. Li, D. Pei, A. J. Liang, P. Dudin, T. K. Kim, C. Cacho, Y. F. Xu, Y. Sun, L. X. Yang, Z. K. Liu, C. Felser, S. S. P. Parkin, Y. L. Chen
Summary: The spin-orbit coupling plays a crucial role in lifting band degeneracy in topological semimetals, leading to the formation of Dirac/Weyl semimetals. This study directly observed the gap structure along the nodal line in a magnetic WSM using high-resolution angle-resolved photoemission spectroscopy, providing insights into the strong SOC effect in the formation of the WSM phase.
NPJ QUANTUM MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jia-Xuan Tang, Pei-Hao Wang, Yu-Rong You, Ya-Dong Wang, Zhan Xu, Zhi-Peng Hou, Hong-Guo Zhang, Gui-Zhou Xu, Feng Xu
Summary: The magnetic and electrical transport properties of hexagonal noncollinear ferromagnetic MnFeGe alloy were systematically studied, revealing the presence of abnormal M-type magnetoresistance (MR) in the low-field region, which is related to magnetic domain change and the formation of labyrinth domain and sparse bubbles.
Article
Chemistry, Physical
Shuang Pan, Yuqing Bai, Jiaxuan Tang, Peihao Wang, Yurong You, Guizhou Xu, Feng Xu
Summary: This study prepared high quality and large size thin CrI3, V and Mn doped single crystals using the chemical vapor transfer method. It was found that CrI3 and CrMn0.06I3 exhibited a remarkable irreversible Barkhausen effect, and the introduction of Mn doping element increased the saturation magnetization intensity. Additionally, Cr0.5V0.5I3 showed significantly increased coercivity force and larger magnetocrystalline anisotropy compared to CrI3, while maintaining similar Curie temperature and good environmental stability. First principles calculations indicated smaller band gaps in Cr0.5V0.5I3 and VI3, making them alternative choices for future research of spintronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Multidisciplinary
Bingyan Jiang, Jiaji Zhao, Jiangyuan Qian, Shen Zhang, XiaoBin Qiang, Lujunyu Wang, Ran Bi, Juewen Fan, Hai-Zhou Lu, Enke Liu, Xiaosong Wu
Summary: This study observes a magnetic-field-antisymmetric Seebeck effect in a tilted Weyl semimetal, indicating that tilting the Weyl cone can break the Lorentz invariance and introduce new physics. The phenomenon is further confirmed by theoretical calculations and experiments.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Zheng Li, Yibo Wang, Zhonghao Xia, Qiangqiang Zhang, Zezhong Li, Enke Liu, Zhuhong Liu
Summary: In this study, the AHE in Fe3Ge alloys was investigated, revealing their ferromagnetic and metallic properties. The AHC of DO19 and DO3 structures were measured to be 175 and 106 S/cm, respectively, indicating the significant influence of Berry curvature on AHE. These findings suggest that Fe3Ge alloys hold promise for the development of topological spintronic devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
C. Z. Meng, D. T. Zhang, J. H. Jia, J. J. Yang, Y. Teng, H. G. Zhang, Y. Q. Li, W. Q. Liu, M. Yue
Summary: The effect of casting method on the magnetic properties of Sm(Co0.63Fe0.28Cu0.07Zr0.02)(7.6) magnet was investigated. The study found that the plate-mold ingot (PM) and strip-casting flake (SC) had the same phase composition. However, SC had a smaller grain size and larger fine-grain region, resulting in lower remanence compared to PM. XRD and EBSD results revealed that the fine grains in SC were unfavorable for alignment under a magnetic field, leading to poorer easy-axis orientation compared to PM.
Article
Materials Science, Multidisciplinary
Jianjun Yang, Dongtao Zhang, Hongguo Zhang, Yuqing Li, Chengzhen Meng, Yuan Teng, Weiqiang Liu, Ming Yue
Summary: In this paper, a new pulverizing approach composed of strip-casting, hydrogen decrepitation, and jet milling was used to produce a sintered magnet of Sm(Co0.65Fe0.28Cu0.05Zr0.02)7.6 with excellent magnetic performance. The various processes in the approach, such as the slowed down rotating speed during strip-casting, hydrogen decrepitation, and jet milling, contribute to improved magnetic properties through increased monocrystalline particles, uniform composition, and concentrated particle size distribution. The combined approach, along with solid-solution treatment optimization, results in promising magnetic properties such as high remanence, coercivity, saturation magnetization, and maximum energy product.
Article
Materials Science, Multidisciplinary
Shuang Pan, Li Tang, Yuqing Bai, Jiaxuan Tang, Zhishuo Zhang, Bin Chen, Yong Guo, Jie Zhu, Guizhou Xu, Feng Xu
Summary: Recently, interesting magnetic and electrical properties have been observed in transition-metal intercalated 2H-NbS2/TaS2 single crystals. In this study, Cr and Fe co-intercalated 2H-NbS2 single crystals were grown and their magnetic and transport properties were investigated. The magnetic transition temperature decreased from 117 to 37 K with increasing Fe content, and the magnetic coupling changed from ferromagnetic to antiferromagnetic. The x = 0.50 compound exhibited large anomalous Hall conductivity, which was discussed in terms of calculated electronic structures. The realization of perpendicular anisotropy and large anomalous Hall conductivity in this two-dimensional ferromagnetic system can potentially enhance their applications in spintronic devices.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Energy & Fuels
Yong Li, Xinyue Ye, Lingwei Li, Enke Liu
Summary: The emergent evolution of first-order phase transitions from magneto-structural to magneto-elastic and magnetocaloric effect have been investigated. The results show that by applying the isostructural alloying principle, the martensitic transition temperature increases effectively and the Curie temperatures of the two phases increase slightly. With appropriate Fe and Si content, an emergent first-order antiferromagnetic-ferromagnetic magnetoelastic transition occurs. Moreover, the values of magnetic entropy change, refrigeration capacity, and temperature-averaged entropy change reach significant values.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Physics, Applied
Cheng Zhang, Shuang Pan, Peihao Wang, Yuchen Men, Xiang Li, Yuqing Bai, Li Tang, Feng Xu, Guizhou Xu
Summary: This study explores the electrical transport behavior of Mn2CoGa1-xAlx alloys and identifies their potential as spin gapless semiconductors with high carrier mobility.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Guijiang Li, Enke Liu, Wenhong Wang, Guangheng Wu
Summary: In this study, the elastic properties, phase stability, and magnetism of Ni2MnT compounds in the all-d-metal Heusler family were investigated through first-principles calculations. It was found that the conventional atomic preferential occupation rule did not fully apply to these compounds. The lattice sizes of the compounds were determined by the atomic radius. The most likely martensitic phase transition could be expected in weakly magnetic Ni2MnT compounds with late transition metal atoms. The martensitic phase transition could be suppressed or re-evoked through hydrostatic pressure or adjusting the composition of Ti in the system. The paper also revealed the origin of antiferromagnetism in Ni2MnTi and the enhanced ductility in Ni2MnY and Ni2MnTa compounds. This study provides insights into the mechanism of martensitic phase transition and the design of functional magnetic materials in the all-d-metal Heusler family.
Article
Materials Science, Multidisciplinary
Jiaji Zhao, Bingyan Jiang, Shen Zhang, Lujunyu Wang, Enke Liu, Zhilin Li, Xiaosong Wu
Summary: In this study, a magnetoresistance technique was used to investigate the kagome material Co3Sn2S2. Besides magnon magnetoresistance, chirality-dependent magnetoresistance, and chiral-anomaly-induced magnetoresistance, an intriguing orbital magnetoresistance scaling only with the out-of-plane field was observed, indicating its two-dimensional nature.
Article
Materials Science, Multidisciplinary
Zhang Zhou, Xiaoxu Zhao, Liangmei Wu, Hongtao Liu, Jiancui Chen, Chuanyin Xi, Zhaosheng Wang, Enke Liu, Wu Zhou, Stephen J. Pennycook, Sokrates T. Pantelides, Xiao-Guang Zhang, Lihong Bao, Hong-Jun Gao
Summary: This study reports a dimensional crossover in self-intercalated antiferromagnetic V5S8 nanoflakes. The transition from three-dimensional to two-dimensional transport is observed when the thickness of V5S8 flakes is reduced to a certain value. The emergence of Kondo physics and the change in magnetoresistance indicate the influence of dimensional crossover on the electronic properties of 2D metallic transition-metal dichalcogenides (TMDs).
Article
Quantum Science & Technology
Qingqi Zeng, Hongyi Sun, Jianlei Shen, Qiushi Yao, Qian Zhang, Nana Li, Lin Jiao, Hongxiang Wei, Claudia Felser, Yonggang Wang, Qihang Liu, Enke Liu
Summary: This study investigates the phenomenon of magnetic materials undergoing different magnetic and topological phases during pressure loading, and agrees well with experimental data. The study also reveals the disappearance of magnetic order, consistent with theoretical predictions.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
