Article
Chemistry, Multidisciplinary
Lin Huang, Yongjian Zhou, Hongsong Qiu, Hua Bai, Chong Chen, Weichao Yu, Liyang Liao, Tingwen Guo, Feng Pan, Biaobing Jin, Cheng Song
Summary: The inverse spin Hall effect (ISHE) has been investigated in Mn2Au/[Co/Pd] heterostructures, showing that the direction of the Neel vector has a significant impact on the ISHE signal. This finding not only expands the study of the Hall effect, but also enhances the flexibility of antiferromagnetic spintronics.
ADVANCED MATERIALS
(2022)
Article
Quantum Science & Technology
Biswajit Sahoo, Koustuv Roy, Pushpendra Gupta, Abhisek Mishra, Biswarup Satpati, Braj Bhusan Singh, Subhankar Bedanta
Summary: The study focuses on spin pumping and inverse spin Hall effect in an IrO2/CoFeB system. By analyzing the angular dependence of ISHE voltage, it identifies the significant contribution of spin pumping to the ISHE signal. The research shows that polycrystalline IrO2 thin film exhibits high spin Hall conductivity and spin Hall angle comparable to Pt.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Physics, Applied
Michael Balinskiy, Howard Chiang, David Gutierrez, Alexander Khitun
Summary: This experiment demonstrates a spin wave interference detection using an inverse spin Hall effect (ISHE). By controlling the phase difference between two spin waves, oscillations in ISHE voltage can be observed. The experimental results show the potential of using ISHE to convert spin wave phase into an electric signal.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
X. R. Wang
Summary: The authors demonstrate an anomalous spin Hall and inverse spin Hall effect, predicting the generation of spin currents with different directions in magnetic systems. This offers potential applications in spintronics for generating spin currents with various polarization orientations.
COMMUNICATIONS PHYSICS
(2021)
Article
Physics, Applied
Koustuv Roy, Abhisek Mishra, Pushpendra Gupta, Shaktiranjan Mohanty, Braj Bhusan Singh, Subhankar Bedanta
Summary: The study reveals the potential of antiferromagnetic materials as replacements for heavy metals in spintronic devices, the mechanism of spin pumping in CoFeB/IrMn heterostructures is driven by IrMn underneath, and the dominance of spin pumping in all samples is confirmed by angle dependent ISHE measurements.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Xiaorong Ren, Xiangyu Zeng, Chunxiang Liu, Chuanfu Cheng, Ruirui Zhang, Yuqin Zhang, Zijun Zhan, Qian Kong, Rui Sun, Chen Cheng
Summary: The optical spin Hall effect (OSHE) of light field from a closed elliptical metallic curvilinear nanoslit is investigated instead of the usual truncated curvilinear nanoslit. By utilizing characteristic bright spots in the light field formed by the noncircular symmetry of the elliptical slit and introducing a method to separate incident spin component and converted spin component, the OSHE manifested in the spot shifts was clearly observable. The slope of the elliptical slit provided a geometric phase gradient, resulting in opposite and double shifts of the characteristic spots in centrosymmetry.
Article
Chemistry, Multidisciplinary
Pushpendra Gupta, Braj Bhusan Singh, Koustuv Roy, Anirban Sarkar, Markus Waschk, Thomas Brueckel, Subhankar Bedanta
Summary: The study investigates the damping properties and spin pumping phenomenon of La0.67Sr0.33MnO3/Pt bilayers, revealing the potential application of high spin polarization materials in spintronics. The results suggest that both anti-damping and spin pumping phenomena occur simultaneously in the system.
Article
Multidisciplinary Sciences
Takuya Kawada, Masashi Kawaguchi, Takumi Funato, Hiroshi Kohno, Masamitsu Hayashi
Summary: The observation of the acoustic spin Hall effect shows that spin current can be induced by lattice motion through spin-orbit interaction. The results demonstrate the strong coupling of electron spins with rotating lattices via the SOI, highlighting the potential of lattice dynamics to supply spin current in strong spin-orbit metals. The spin current in nonmagnetic metals scales with the SOI and the time derivative of the lattice displacement, leading to a field-dependent acoustic voltage in NM/ferromagnetic metal bilayers.
Article
Multidisciplinary Sciences
Taiki Uehara, Takumi Ohtsuki, Masafumi Udagawa, Satoru Nakatsuji, Yo Machida
Summary: This study reveals that the thermal conductivity in Pr2Ir2O7 is dominated by phonons, and the resonant scattering of phonons on paramagnetic spins strongly impedes the longitudinal heat current. The resonant scattering is affected by the development of spin ice correlation upon cooling, leading to an anisotropic deviation from the scaling of thermal conductivity with respect to field directions. Additionally, a correlation between longitudinal and transverse thermal conductivity is observed, providing solid evidence for the role of spin-phonon scattering in hindering longitudinal heat conduction and generating transverse response.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Yougang Ke, Yongfeng Bian, Qiang Tang, Jibo Tian, Linzhou Zeng, Yu Chen, Xinxing Zhou
Summary: In this paper, the authors introduce a novel three-dimensional rotational photonic spin Hall effect (PSHE) and demonstrate how to control the rotation angle of the splitting patterns by adjusting the rotation angle of metasurfaces. They also show that the number of lobes in the splitting patterns can be independently controlled by introducing a dynamic phase. These findings enable active manipulation of spin photons in multiple dimensions and may have potential applications in optical microscopy, among other areas.
Article
Instruments & Instrumentation
Peiwen Luo, Zhe Wu, Fei Huang, Bin Peng, Wenxu Zhang
Summary: A scanning inverse spin Hall effect measurement system based on a shorted coaxial resonator has been developed in this study, providing a high throughput method for characterizing spin transport properties. The system allows spin pumping measurements on patterned samples within a 100 x 100 mm(2) area. Testing with Py/Ta bilayer stripes of different Ta thicknesses demonstrated a spin diffusion length of approximately 4.2 nm and a conductivity of about 7.5 x 10(5)?(-1) m(-1), indicating the intrinsic mechanism of Ta spin relaxation as the Elliott-Yafet interactions. The spin Hall angle of Ta was estimated to be around -0.014 at room temperature. This setup offers a convenient, efficient, and nondestructive approach to explore the spin and electron transportation characteristics of spintronic materials, facilitating the development of new materials and understanding their mechanism.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Physics, Multidisciplinary
Zhejunyu Jin, Xianglong Yao, Zhenyu Wang, H. Y. Yuan, Zhaozhuo Zeng, Weiwei Wang, Yunshan Cao, Peng Yan
Summary: It has been discovered that hidden nonlinear magnon transport in magnetic textures can generate fictitious magnetic fields. By analyzing the scattering features between magnons and skyrmions, a significant Hall angle in both confluence and splitting modes has been predicted, and it has been found that the Hall angle reverses its sign when switching the handedness of the incident magnons. This finding may open up new possibilities for probing gauge fields through nonlinear means.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Huifeng Chen, Guanyu Liu, Shuang Zhang, Yongchun Zhong, Jianhui Yu, Zhe Chen, Wenguo Zhu
Summary: The photonic spin Hall effect (SHE) is the transverse separation of spin photons in refraction and reflection phenomena. This study investigates the spin-orbit coupling (SOC) in nonlinear uniaxial crystals and demonstrates the SHE of second-harmonic photons. The generation and evolution processes of nonlinear spin photons within the crystal are visualized, and a high-speed modulation scheme for the SHE is proposed.
LASER & PHOTONICS REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Sara Catalano, Juan M. Gomez-Perez, M. Xochitl Aguilar-Pujol, Andrey Chuvilin, Marco Gobbi, Luis E. Hueso, Felix Casanova
Summary: Spin Hall magnetoresistance (SMR) is a reference tool used to investigate the magnetic properties of materials, but realistic surfaces may lead to unexpected artifacts in SMR due to defects and disorder. This study discovers that the SMR-like signal in heterostructures is generated by strong interfacial disorder, challenging the widespread assumption on the role of disorder in SMR measurements.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Xianzhe Chen, Shuyuan Shi, Guoyi Shi, Xiaolong Fan, Cheng Song, Xiaofeng Zhou, Hua Bai, Liyang Liao, Yongjian Zhou, Hanwen Zhang, Ang Li, Yanhui Chen, Xiaodong Han, Shan Jiang, Zengwei Zhu, Huaqiang Wu, Xiangrong Wang, Desheng Xue, Hyunsoo Yang, Feng Pan
Summary: The study reports the observation of a magnetic spin Hall effect in a collinear antiferromagnet, Mn2Au, where spin currents are generated on two spin sublattices by breaking spatial symmetry, providing a new pathway for controlling spin currents.
Review
Physics, Multidisciplinary
Jorge Puebla, Yunyoung Hwang, Kouta Kondou, Yoshichika Otani
Summary: This paper provides an overview of the progress in spin conversion and discusses the additional consequences beyond efficient spin conversion that arise from the formation of quasiparticles at band crossings.
ANNALEN DER PHYSIK
(2022)
Article
Engineering, Electrical & Electronic
A. V. Chumak, P. Kabos, M. Wu, C. Abert, C. Adelmann, A. O. Adeyeye, J. Akerman, F. G. Aliev, A. Anane, A. Awad, C. H. Back, A. Barman, G. E. W. Bauer, M. Becherer, E. N. Beginin, V. A. S. V. Bittencourt, Y. M. Blanter, P. Bortolotti, I. Boventer, D. A. Bozhko, S. A. Bunyaev, J. J. Carmiggelt, R. R. Cheenikundil, F. Ciubotaru, S. Cotofana, G. Csaba, O. V. Dobrovolskiy, C. Dubs, M. Elyasi, K. G. Fripp, H. Fulara, I. A. Golovchanskiy, C. Gonzalez-Ballestero, P. Graczyk, D. Grundler, P. Gruszecki, G. Gubbiotti, K. Guslienko, A. Haldar, S. Hamdioui, R. Hertel, B. Hillebrands, T. Hioki, A. Houshang, C. -M. Hu, H. Huebl, M. Huth, E. Iacocca, M. B. Jungfleisch, G. N. Kakazei, A. Khitun, R. Khymyn, T. Kikkawa, M. Klaui, O. Klein, J. W. Klos, S. Knauer, S. Koraltan, M. Kostylev, M. Krawczyk, I. N. Krivorotov, V. V. Kruglyak, D. Lachance-Quirion, S. Ladak, R. Lebrun, Y. Li, M. Lindner, R. Macedo, S. Mayr, G. A. Melkov, S. Mieszczak, Y. Nakamura, H. T. Nembach, A. A. Nikitin, S. A. Nikitov, V. Novosad, J. A. Otalora, Y. Otani, A. Papp, B. Pigeau, P. Pirro, W. Porod, F. Porrati, H. Qin, B. Rana, T. Reimann, F. Riente, O. Romero-Isart, A. Ross, A. V. Sadovnikov, A. R. Safin, E. Saitoh, G. Schmidt, H. Schultheiss, K. Schultheiss, A. A. Serga, S. Sharma, J. M. Shaw, D. Suess, O. Surzhenko, K. Szulc, T. Taniguchi, M. Urbanek, K. Usami, A. B. Ustinov, T. van der Sar, S. van Dijken, V. I. Vasyuchka, R. Verba, S. Viola Kusminskiy, Q. Wang, M. Weides, M. Weiler, S. Wintz, S. P. Wolski, X. Zhang
Summary: Magnonics is a discipline that explores the physical properties of spin waves and utilizes them for data processing. It offers several advantages, such as scalability to atomic dimensions, operation in high-frequency ranges, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS technology. Although primarily in the academic domain, extensive research is being conducted to address the scientific and technological challenges, with several proof-of-concept prototypes already realized in laboratories.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Nanoscience & Nanotechnology
Sudip Majumder, Samiran Choudhury, Saswati Barman, Yoshichika Otani, Anjan Barman
Summary: Active control of spin-wave spectra in two-dimensional nanoscale antidot lattices was demonstrated by varying the antidot diameter, revealing efficient tunability of spin-wave properties with internal structure and external control parameters. Micromagnetic simulations qualitatively reproduced experimental observations, showing characteristics of spin-wave mode profiles.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Physics, Applied
J. Puebla, Y. Hwang, S. Maekawa, Y. Otani
Summary: Surface acoustic waves (SAWs) are elastic waves propagating on the surface of solids with the amplitude decaying into the solid. SAWs can manipulate the magnetization states by magnetostriction and magnetoelastic effects. This review discusses the characteristics of SAW devices and their interaction with the magnetization in thin films.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Masashi Tokuda, Ryoya Nakamura, Masaki Maeda, Yasuhiro Niimi
Summary: Resistance oscillations were studied in two types of superconducting mesoscopic Nb rings. In a simple superconducting ring device, a resistance oscillation with a period of h/2e was observed. In a micro-bridge ring device, higher harmonic resistance oscillations were obtained when the measurement current was well-tuned. The results suggest that higher harmonic resistance oscillations can be detected even in micro-bridge Nb superconducting ring devices with sizes larger than the coherence length of Nb.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Kei Yamamoto, Mingran Xu, Jorge Puebla, Yoshichika Otani, Sadamichi Maekawa
Summary: In this paper, a theoretical description of magnon-phonon interactions in multilayer structures containing a ferromagnetic thin film is presented. The formalism takes into account external magnetic fields in arbitrary directions and various types of acoustic waves, including Rayleigh and Love surface modes. By paying attention to the spatial profile of acoustic wave modes and deriving analytical expressions for effective coupling coefficients, the study successfully reproduces a strongly anisotropic and non-reciprocal linewidth observed in recent experiments of acoustic ferromagnetic resonance.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Kouta Kondou, Masanobu Shiga, Shoya Sakamoto, Hiroyuki Inuzuka, Atsuko Nihonyanagi, Fumito Araoka, Masaki Kobayashi, Shinji Miwa, Daigo Miyajima, YoshiChika Otani
Summary: This study investigates chirality-induced current-in-plane magnetoresistance in a chiral molecule/ferromagnetic metal bilayer, and finds that the magnetoresistance is related to thermally driven spontaneous spin polarization in chiral molecules.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Physics, Applied
Kun Zhang, Lei Chen, Yue Zhang, Bin Hong, Yu He, Kelian Lin, Zhizhong Zhang, Zhenyi Zheng, Xueqiang Feng, Youguang Zhang, Yoshichika Otani, Weisheng Zhao
Summary: This study demonstrates efficient bulk spin-orbit torque-induced perpendicular magnetization switching under relatively low critical current density in thick Pt/Co multilayers with gradient-induced symmetry breaking. Through tuning the thickness gradient of Pt, the efficiency and chirality of spin-orbit torque can be highly controlled. Atomic intermixing is found to significantly enhance the spin-orbit torque efficiency.
APPLIED PHYSICS REVIEWS
(2022)
Article
Optics
T. P. Lyons, D. J. Gillard, C. Leblanc, J. Puebla, D. D. Solnyshkov, L. Klompmaker, I. A. Akimov, C. Louca, P. Muduli, A. Genco, M. Bayer, Y. Otani, G. Malpuech, A. I. Tartakovskii
Summary: In this study, we investigate the relationship between spin polarization of a 2DEG in a monolayer semiconductor and light-matter interactions modified by an optical microcavity. We observe a pronounced spin-susceptibility of the 2DEG, leading to the observation of a giant effective valley Zeeman splitting for trion-polaritons. We also demonstrate effective optical nonlinearity and all-optical tuning of the polaritonic Zeeman splitting. This study lays the groundwork for engineering topological phases with true unidirectionality in monolayer semiconductors.
Article
Physics, Multidisciplinary
Tomonori Arakawa, Takashi Oka, Seitaro Kon, Yasuhiro Niimi
Summary: The dynamical conductivity of a system can provide microscopic information about the dissipative and nondissipative processes induced by ac-electric fields. In this study, a noncontact method using a circular cavity resonator is established to measure the real and imaginary parts of longitudinal and Hall conductivities at a microwave frequency in magnetic fields. The results reveal the presence of conventional Shubnikov-de Haas oscillations in the real part of longitudinal conductivity and quantum Hall plateaus in the real part of Hall conductivity. The periodic structures observed in the imaginary part are attributed to intra-Landau level transitions between different orbital angular momenta.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Tomoharu Ohta, Kaito Kurokawa, Nan Jiang, Kohei Yamagami, Yoshinori Okada, Yasuhiro Niimi
Summary: We have systematically studied the magnetotransport properties of van der Waals magnetic materials (Fe1-xCox)(5)GeTe2, where the magnetic phase changes from ferromagnetic with perpendicular or in-plane magnetic anisotropy to antiferromagnetic. We found that the magnetic properties observed in bulk materials also exist in thin film devices. The anomalous Hall effect was observed in low Co substitution, but the magnetic hysteresis disappeared for in-plane magnetic anisotropy. In the antiferromagnetic region, the anomalous Hall effect was absent in low magnetic fields and a clear hysteresis was observed at 2.5 T. The defects and resistance upturn below 30 K were suggested to be related to the hysteric behavior at the spin-flop transition. Our findings provide a guideline for constructing van der Waals magnetic devices using different Co substitutions.
APPLIED PHYSICS LETTERS
(2023)
Article
Quantum Science & Technology
Surya Narayan Panda, Bivas Rana, YoshiChika Otani, Anjan Barman
Summary: This study investigates magnetization dynamics in different NM/Co20Fe60B20 heterostructures using femtosecond pulsed laser-induced time-resolved magneto-optical Kerr effect magnetometry. It is found that the SOC strength of the underlayer has a systematic influence on ultrafast demagnetization time, fast remagnetization time, and the Gilbert damping parameter. The spin pumping formalism estimates that higher SOC strength results in more efficient transport of spin current.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Physics, Multidisciplinary
Angshuman Deka, Bivas Rana, Ryo Anami, Katsuya Miura, Hiromasa Takahashi, YoshiChika Otani, Yasuhiro Fukuma
Summary: This study investigates the application of electric field controlled magnetization dynamics in low-power spintronic devices. Electric field induced parametric excitation was successfully achieved by using interfacial in-plane magnetic anisotropy. The excitation wavelength can be tuned by changing the input power and frequency of the applied voltage. A phenomenological model was developed to explain the role of electric field torque. This research offers an opportunity for developing nanoscale magnonic devices and exploring nonlinear dynamics in nanomagnetic systems.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Liyang Liao, Fenghua Xue, Lei Han, Junyeon Kim, Ruiqi Zhang, Lun Li, Jiuming Liu, Xufeng Kou, Cheng Song, Feng Pan, YoshiChika Otani
Summary: A strong torque effect was observed in CoFeB/Ru/Al2O3 polycrystalline stacks, where the unfilled d-shell and small spin-orbit coupling in Ru provide an ideal platform for orbital generation and transport. Orbit transport in polycrystalline materials exhibits a unique random precession behavior, which leads to higher efficiency compared to single crystals.
Article
Materials Science, Multidisciplinary
Shuichi Iwakiri, Satoshi Sugimoto, Yasuhiro Niimi, Yusuke Kozuka, Yukiko K. Takahashi, Shinya Kasai, Kensuke Kobayashi
Summary: The study reveals a clear negative correlation between the linear and lowest-order nonlinear currents in the current-voltage characteristics of magnetic tunnel junctions (MTJ), which is independent of temperature and tunnel barrier thickness. A proposed phenomenological model based on the Julliere model attributes this negative correlation to spin-flip tunneling assisted by a magnon, suggesting a fundamental law governing the linear and nonlinear responses of MTJ.
