Article
Materials Science, Multidisciplinary
Andreas Costa, Jaroslav Fabian
Summary: Ferromagnetic spin valves with superconducting spacers were investigated for their tunneling conductance and magnetoresistance characteristics in the presence of interfacial spin-orbit couplings. Analysis revealed the competition between singlet and triplet gaps in the superconducting state, leading to significant conductance and magnetoresistance magnetoanisotropies. The study sheds light on the potential of superconducting magnetic spin valves for future superconducting-spintronics applications.
Article
Chemistry, Multidisciplinary
Wonhee Ko, Jose L. Lado, Petro Maksymovych
Summary: Researchers present a new method to probe Andreev reflection in tunnel junctions, using tunneling spectroscopy and junction tunability for quantitative detection of superconductivity. This method allows for unambiguous identification of the origin of superconducting excitations and the detection of higher order Andreev processes in atomic-scale junctions.
Article
Materials Science, Multidisciplinary
Hirokazu Fujiwara, Kensei Terashima, Junya Otsuki, Nayuta Takemori, Harald O. Jeschke, Takanori Wakita, Yuko Yano, Wataru Hosoda, Noriyuki Kataoka, Atsushi Teruya, Masashi Kakihana, Masato Hedo, Takao Nakama, Koichiro Yaji, Ayumi Harasawa, Kenta Kuroda, Shik Shin, Koji Horiba, Hiroshi Kumigashira, Yuji Muraoka, Takayoshi Yokoya, Yoshichika Onuki
Summary: The spin-dependent band structure of CoS2, a candidate for a half-metallic ferromagnet, was investigated to reevaluate its half-metallicity and electronic correlations. The results suggest that CoS2 is not a perfect half-metal but very close, with anomalously enhanced spin-dependent electron correlation effects near the half-metallic state.
Article
Chemistry, Physical
Neda Nazemi, Farzad Ahmadian, Arash Boochani
Summary: First principles and density functional theory calculations were used to investigate the structural, electronic, and magnetic properties of Heusler compounds O2BaX (X = Na, K, Rb, and Cs) using the FPLAPW method. The results revealed that the ground state of these compounds exhibited an AlCu2Mn-type structure in the ferromagnetic state. The compounds were predicted to be ferromagnetic half-metals in both AlCu2Mn-type and CuHg2Ti-type phases. The study also examined the origin of their half-metallic behavior using electronic density of states (DOSs).
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Quan Zhang, Yang Zhang, Ying Li, Dangqi Fang, Junwei Che, Erhu Zhang, Peng Zhang, Shengli Zhang
Summary: This study proposes a 2D intrinsic metal-free half-metallic ferromagnet with complete spin-polarization and high Curie temperature. The material shows stability against external strain and carrier doping, and surprisingly, electron doping can enhance its Curie temperature.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Deepti Rana, R. Aswini, G. Basavaraja, Chandan Patra, Sandeep Howlader, Rajeswari Roy Chowdhury, Mukul Kabir, Ravi P. Singh, Goutam Sheet
Summary: In the new van der Waals Kondo-lattice Fe3GeTe2, a combination of itinerant ferromagnetism and heavy fermionic behavior alters transport behavior at a contact with a superconducting electrode and leads to unconventional proximity-induced superconductivity. Experimental results show an interplay between Andreev reflection and Kondo resonance at interfaces between superconducting Nb and Fe3GeTe2, with a dramatic suppression of conductance at zero bias below the critical temperature of Nb.
Article
Materials Science, Multidisciplinary
Y. Fujita, Y. Miura, T. Sasaki, T. Nakatani, K. Hono, Y. Sakuraba
Summary: The study reveals a strong spin-scattering asymmetry at the interface of two ferromagnets, leading to enhanced MR output in pseudo-spin-valve devices at room temperature. The findings indicate the presence of large gamma at a half-metallic FM/FM interface and its impact on the CPP-GMR effect even at RT.
Article
Chemistry, Physical
A. Birsan, V Kuncser
Summary: The research efforts in this study focused on implementing Heusler materials into spintronic heterostructures, specifically investigating the half-metallic and magnetic properties of Zr2CrAl ferrimagnetic compound. Theoretical investigations using Density Functional Theory were conducted on different distortions of the inverse-Heusler cubic crystalline structure. The results showed that the compound exhibited half-metallic characteristics for all considered distortions, and the slight variations in unit cell volume did not affect its high spin polarization state. The calculated magnetic moment per formula unit followed the Slater-Pauling rule, and the antiferromagnetic coupling between Zr and Cr atoms was preserved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Shuvankar Gupta, Sudip Chakraborty, Santanu Pakhira, Celine Barreteau, Jean-Claude Crivello, Bilwadal Bandyopadhyay, Jean Marc Greneche, Eric Alleno, Chandan Mazumdar
Summary: In this study, a novel quaternary Heusler alloy-FeMnVAl-has been synthesized and its structural, magnetic, transport, and electronic properties have been studied through theoretical calculations and experiments. The presence of site disorder between the Fe and Mn atoms in the stable ordered structure of the system is observed. The magnetic measurements confirm the ferromagnetic behavior and the Mossbauer spectroscopy measurements suggest that only the Mn spins are responsible for the magnetic order.
Article
Multidisciplinary Sciences
Vasiliy D. Buchelnikov, Vladimir V. Sokolovskiy, Olga N. Miroshkina, Danil R. Baigutlin, Mikhail A. Zagrebin, Bernardo Barbiellini, Bahadur Singh, Arun Bansil, Erkki Lahderanta
Summary: Si-doped Mn2VGe Heusler alloys exhibit two stable structures at cubic lattice constants of 5.7 and 6.05 angstrom, with nearly degenerate high-spin and low-spin phases at a Si concentration of approximately 3.125 at% at zero temperature. The switching between these phases can be triggered by a pressure of 2.8 GPa at 300 K, making Si-doped Mn2VGe a potentially valuable material platform for spintronics applications.
ADVANCED THEORY AND SIMULATIONS
(2021)
Article
Chemistry, Multidisciplinary
A. R. Jafari, S. Davatolhagh, A. Dehghan
Summary: The study explores the structural, magnetic, thermodynamic, and mechanical stability of p(0)-d half-Heusler compounds, identifying some with half-metallic properties. It is found that these compounds are stable in the half-Heusler β-phase and the ferromagnetic state, making them potentially suitable for spintronic applications.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Physics, Applied
Nilay Maji, Tapan Kumar Nath
Summary: We report the fabrication of a high quality exchanged biased trilayer magnetic tunnel junction (MTJ) using a magnetron sputtering system. The MTJ exhibits exceptional spin dependent transport properties and tunnel magnetoresistance ratios. This structure has significant implications for potential applications in modern spintronic devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Condensed Matter
Ryan Carlile, Juliana Herran, Shashi Poddar, Eric J. Montgomery, Parashu Kharel, Paul M. Shand, Pavel Lukashev
Summary: In this study, magnetocrystalline anisotropy (MCA) in thin film full Heusler alloy Co2CrAl was investigated using first-principles calculations. It was found that at CrAl atomic surface termination, the material retains 100% spin-polarization and exhibits perpendicular magnetic anisotropy. This result could have implications for potential nano-device applications and further experimental studies on similar materials.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Jyoti Kapil, Ashish Pathak, Pramila Shukla
Summary: This paper investigates the structural, electronic, magnetic, elastic, phonon dynamics, and thermodynamic properties of d(0) half-Heusler alloys GeKZ (Z = Ca, Sr) using Density Functional Theory (DFT). The compounds GeKCa and GeKSr are found to be structurally stable in the ferromagnetic alpha-phase and exhibit half-metallic properties with significant spin polarization.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
A. A. Semiannikova, Yu. A. Perevozchikova, V. Yu Irkhin, E. B. Marchenkova, P. S. Korenistov, V. V. Marchenkov
Summary: Parameters of the energy gap have a strong influence on the electronic, magnetic, and galvanomagnetic properties of X(2)YZ Heusler alloys. HMFs and SGSs with high spin polarization are promising materials for spintronics, and the correlations between electronic and magnetic characteristics are observed in different alloy systems.
Article
Chemistry, Physical
Lakhan Bainsla, A. K. Yadav, Y. Venkateswara, S. N. Jha, D. Bhattacharyya, K. G. Suresh
JOURNAL OF ALLOYS AND COMPOUNDS
(2015)
Article
Chemistry, Physical
Lakhan Bainsla, M. Manivel Raja, A. K. Nigam, K. G. Suresh
JOURNAL OF ALLOYS AND COMPOUNDS
(2015)
Article
Physics, Applied
Reza Ranjbar, Kazuya Z. Suzuki, Yuta Sasaki, Lakhan Bainsla, Shigemi Mizukami
JAPANESE JOURNAL OF APPLIED PHYSICS
(2016)
Review
Physics, Applied
Lakhan Bainsla, K. G. Suresh
APPLIED PHYSICS REVIEWS
(2016)
Article
Physics, Applied
K. Z. Suzuki, Y. Miura, R. Ranjbar, L. Bainsla, A. Ono, Y. Sasaki, S. Mizukami
APPLIED PHYSICS LETTERS
(2018)
Article
Physics, Applied
Lakhan Bainsla, Kazuya Z. Suzuki, Masahito Tsujikawa, Hiroki Tsuchiura, Masafumi Shirai, Shigemi Mizukami
APPLIED PHYSICS LETTERS
(2018)
Article
Physics, Applied
L. Bainsla, R. Yilgin, M. Tsujikawa, K. Z. Suzuki, M. Shirai, S. Mizukami
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2018)
Article
Materials Science, Multidisciplinary
Tomoki Tsuchiya, Tufan Roy, Kelvin Elphick, Jun Okabayashi, Lakhan Bainsla, Tomohiro Ichinose, Kazuya Z. Suzuki, Masahito Tsujikawa, Masafumi Shirai, Atsufumi Hirohata, Shigemi Mizukami
PHYSICAL REVIEW MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Deepika Rani, Lakhan Bainsla, K. G. Suresh, Aftab Alam
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2019)
Article
Physics, Applied
Deepika Rani, Lakhan Bainsla, Aftab Alam, K. G. Suresh
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Lakhan Bainsla, Akash Kumar, Ahmad A. Awad, Chunlei Wang, Mohammad Zahedinejad, Nilamani Behera, Himanshu Fulara, Roman Khymyn, Afshin Houshang, Jonas Weissenrieder, Johan Akerman
Summary: This study investigates the characteristics of ultrathin ferrimagnetic films, and for the first time, observes nearly compensated behavior in 2 nm thick Gd-x(Fe87.5Co12.5)(1-x) films, showing great potential for the development of ultrafast and energy efficient ferrimagnetic spintronic devices.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Physics, Applied
Nilamani Behera, Himanshu Fulara, Lakhan Bainsla, Akash Kumar, Mohammad Zahedinejad, Afshin Houshang, Johan Akerman
Summary: The study investigates the use of W-Ta alloying to reduce the auto-oscillation threshold current densities and power consumption of nanoconstriction based spin Hall nano-oscillators. By conducting spin-torque ferromagnetic resonance measurements, it is found that the spin-orbit torque efficiency and spin Hall conductivity significantly improve with the alloying. A 34% reduction in auto-oscillation threshold current density and a 64% reduction in power consumption compared to pure W-based spin Hall nano-oscillators are demonstrated. This work highlights the potential of W-Ta alloying for energy-efficient operation of emerging spintronic devices.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
Deepika Rani, Enamullah, Lakhan Bainsla, K. G. Suresh, Aftab Alam
Article
Materials Science, Multidisciplinary
Lakhan Bainsla, Resul Yilgin, Jun Okabayashi, Atsuo Ono, Kazuya Suzuki, Shigemi Mizukami
Article
Materials Science, Multidisciplinary
Honggyun Kim, Jamal Aziz, Vijay D. Chavan, Deok-kee Kim
Summary: Silicon nitride films were prepared using plasma enhanced chemical vapor deposition with different trap densities induced by adjusting the RF power ratio. It was found that the film's trap density was lowest under compressive stress and increased under tensile stress. This study has significant implications for the formation of durable nitride films in various electronic and optoelectronic applications.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Qiang Yu, Huwei Zhao, Yue Zhao
Summary: Zinc oxide thin films and Al-doped zinc oxide films were prepared and characterized in this study. The addition of Al ions was found to change the growth orientation, increase the grain size, and enhance the absorption intensity in the visible light region. Furthermore, the addition of Al ions also increased the forward current in the heterojunction.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Sang Woo Lee, Min Sun Park, Sangwon Wi, So Yeon Lim, Yeseul Lee, Jin-Seok Chung, Sang Mo Yang
Summary: In this study, we investigated the dynamics of domain switching in pristine and fatigued BiFeO3 capacitors through experimental observations and measurements. The results showed that the switching in the pristine capacitors was dominantly driven by domain growth, while the fatigued capacitors exhibited two different switching dynamics, in which nucleation played a critical role.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Boshi Wang, Tianyi Wang, Yufang Liu, Kun Yu
Summary: In this paper, a tunable and anisotropic perfect absorber composed of anisotropic black phosphorus (BP) and isotropic graphene is proposed. The structure exhibits high absorption and strong anisotropic plasma response. The resonance characteristics can be effectively controlled by adjusting geometric parameters and doping levels, offering potential applications.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xiaolan Liu, Chunyang Li, Tonghui Yang, Naiqiang Yin, Gangling Zhao
Summary: Water drop triboelectric nanogenerators (WD-TENGs) can harvest energy from raindrops and improve the output performance of TENGs.
CURRENT APPLIED PHYSICS
(2024)