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We predict an unconventional spin-transfer torque (STT) acting on the magnetization of a free ferromagnetic (F) layer within N/TI/F vertical heterostructures which originates from strong spin-orbit coupling (SOC) on the surface of a…

Mesoscale and Nanoscale Physics · Physics 2012-10-18 Farzad Mahfouzi , Naoto Nagaosa , Branislav K. Nikolic

We report the observation of the intrinsic damping-like spin-orbit torque (SOT) arising from the Berry curvature in metallic-magnet/CuO$_x$ heterostructures. We show that a robust damping-like SOT, an order of magnitude larger than a…

Materials Science · Physics 2018-07-11 Tenghua Gao , Alireza Qaiumzadeh , Hongyu An , Akira Musha , Yuito Kageyama , Ji Shi , Kazuya Ando

We report on the highly efficient spin-orbit torque (SOT) generation in epitaxial SrIrO$_{3}$(SIO), which is grown on an orthorhombic DyScO$_{3}$(110) substrate. By conducting harmonic Hall measurement in Co$_{20}$Fe$_{60}$B$_{20}$…

Materials Science · Physics 2023-06-12 Sosuke Hori , Kohei Ueda , Takanori Kida , Masayuki Hagiwara , Jobu Matsuno

Spin-orbit torque (SOT) is an emerging technology that enables the efficient manipulation of spintronic devices. The initial processes of interest in SOTs involved electric fields, spin-orbit coupling, conduction electron spins and…

The magnetization manipulation by spin-orbit torques (SOTs) in nonmagnetic-metal (NM)/ferromagnet (FM) heterostructures has provided great opportunities for spin devices. Besides the conventional spin Hall effect (SHE) in heavy metals with…

Applied Physics · Physics 2023-12-11 Zishuang Li , Wenqiang Wang , Kaiyuan Zhou , Xiang Zhan , Tiejun Zhou , Ronghua Liu

We measure spin-orbit torques (SOTs) in a unique model system of all-epitaxial ferrite/Pt bilayers to gain insights into charge-spin interconversion in Pt. With negligible electronic conduction in the insulating ferrite, the crystalline Pt…

Current-induced spin-orbit torque (SOT) in normal metal/ferromagnet (NM/FM) bilayers bears great promise for technological applications, but the microscopic origin of purely interfacial SOTs in ultra-thin systems is not yet fully…

Mesoscale and Nanoscale Physics · Physics 2023-02-02 Alessandro Veneri , David T. S. Perkins , Aires Ferreira

We have studied the spin orbit torque (SOT) in Pt/Co/Ir multilayers with 3 repeats of the unit structure. As the system exhibits oscillatory interlayer exchange coupling (IEC) with varying Ir layer thickness, we compare the SOT of films…

Mesoscale and Nanoscale Physics · Physics 2020-05-19 Yuto Ishikuro , Masashi Kawaguchi , Tomohiro Taniguchi , Masamitsu Hayashi

We present a novel design of a strained topological insulator spin-orbit torque random access memory (STI-SOTRAM) bit cell comprising a piezoelectric/magnet (gating)/topological insulator (TI)/magnet (storage) heterostructure that leverages…

Mesoscale and Nanoscale Physics · Physics 2025-03-03 Md Golam Morshed , Hamed Vakili , Mohammad Nazmus Sakib , Samiran Ganguly , Mircea R. Stan , Avik W. Ghosh

Magnetic insulators (MIs) attract tremendous interest for spintronic applications due to low Gilbert damping and absence of Ohmic loss. Magnetic order of MIs can be manipulated and even switched by spin-orbit torques (SOTs) generated…

Spin-orbit torque (SOT) presents a promising avenue for energy-efficient spintronics devices, surpassing the limitations of spin transfer torque. While extensively studied in heavy metals, SOT in antiferromagnetic quantum materials remains…

We studied the spin-to-charge and charge-to-spin conversion at room temperature in sputtered WTe2-x (x=0.8)(t)/Co20Fe60B20(6 nm) heterostructures. Spin pumping measurements were used to characterize the spin-to-charge efficiency and the…

We present harmonic transverse voltage measurements of current-induced thermoelectric and spin-orbit torque (SOT) effects in ferromagnet/normal metal bilayers, in which thermal gradients produced by Joule heating and SOT coexist and give…

Mesoscale and Nanoscale Physics · Physics 2017-04-25 Can Onur Avci , Kevin Garello , Mihai Gabureac , Abhijit Ghosh , Andreas Fuhrer , Santos F. Alvarado , Pietro Gambardella

Complex ferromagnetic oxides such as La$_{0.67}$Sr$_{0.33}$MnO$_3$ (LSMO) offer pathways for creating energy efficient spintronic devices with new functionalities. LSMO exhibits high-temperature ferromagnetism, half metallicity, sharp…

Efficient generation of spin-orbit torques (SOTs) is central for the exciting field of spin-orbitronics. Platinum, the archetypal spin Hall material, has the potential to be an outstanding provider for spin-orbit torques due to its giant…

Mesoscale and Nanoscale Physics · Physics 2021-08-17 Lijun Zhu , Daniel C. Ralph , Robert A Buhrman

The technique of conventional ferromagnet/heavy-metal spin-orbit torque (SOT) offers significant potential for enhancing the efficiency of magnetic memories. However, it faces fundamental physical limitations, including hunting effects from…

While tremendous work has gone into spin-orbit torque and spin current generation, charge-to-spin conversion efficiency remains weak in silicon to date, generally stemming from the low spin-orbit coupling (low atomic number, Z) and lack of…

Van der Waals (vdW) heterostructure of two-dimensional (2D) quantum materials offers a promising platform for efficient control of magnetization dynamics for non-volatile spin-based devices. However, energy-efficient field-free spin-orbit…

It has been shown that W in its resistive form possesses the largest spin-Hall ratio among all heavy transition metals, which makes it a good candidate for generating efficient dampinglike spin-orbit torque (DL-SOT) acting upon adjacent…

Materials Science · Physics 2018-01-12 Ting-Chien Wang , Tian-Yue Chen , Chun-Te Wu , Hung-Wei Yen , Chi-Feng Pai

Magnetization reversal of a perpendicular ferromagnetic free layer by spin-orbit torque (SOT) is an attractive alternative to spin-transfer torque (STT) switching in magnetic random-access memory (MRAM) where the write process involves…

Mesoscale and Nanoscale Physics · Physics 2015-11-19 Yong-Chang Lau , Davide Betto , Karsten Rode , JMD Coey , Plamen Stamenov
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