Charge-spin interconversion and its applications in magnetic sensing

Wu，Yihong1; Xu，Yanjun1; Luo，Ziyan1,2; Yang，Yumeng3; Xie，Hang1; Zhang，Qi1,4; Zhang，Xinhai4

2021-02-14

10.1063/5.0039926

JOURNAL OF APPLIED PHYSICS   影响因子和分区

0021-8979

1089-7550

Charge-spin interconversion provides an effective way to generate spin current, spin-orbit torque, and unconventional magnetoresistance that is different from the magnetoresistance originated from spin-polarized current. A widely studied system that leads to all these phenomena is the ferromagnet/heavy metal bilayer, in which spin accumulation/current is generated through either the spin Hall effect in the heavy metal layer or Rashba-Edelstein effect at the ferromagnet/heavy metal interface. The subsequent interaction of the current-induced spins with the ferromagnet generates spin-orbit torque, and the inverse conversion of the backflow spin current to charge current in the heavy metal layer leads to different types of magnetoresistances. Many proof-of-concept devices and applications have been demonstrated based on the spin-orbit torque and magnetoresistance in the bilayer system, including non-volatile memory, logic, nano-oscillator, magnetic sensor, neuromorphic and scholastic computing, etc. In addition to the bilayer systems, recently there is also a growing interest in charge-spin interconversion in single-layer ferromagnets. In this Perspective, we first introduce the charge-spin interconversion in different systems based on phenomenological models, after which we show how the spin-orbit torque and spin Hall magnetoresistance in ferromagnet/heavy metal bilayers can be exploited for magnetic sensing applications. We also discuss charge-spin interconversion in single-layer ferromagnets via the anomalous Hall effect.

SCI ; EI

英语

其他

Ministry of Education, Singapore["MOE2018-T2-1-076","MOE2017-T2-2-011"] ; Singapore National Research Foundation, Prime Minister's Office, under its Competitive Research Programme[NRF-CRP10-2012-03]

Physics

Physics, Applied

WOS:000630515300001

AMER INST PHYSICS

20210809945603

Computation theory ; Digital storage ; Ferromagnetic materials ; Ferromagnetism ; Hall effect devices ; Heavy metals ; Magnetoresistance ; Magnets ; Spin fluctuations ; Spin orbit coupling ; Superconducting materials ; Torque

Metallurgy and Metallography:531 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Superconducting Materials:708.3 ; Magnetic Materials:708.4 ; Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory:721.1 ; Data Storage, Equipment and Techniques:722.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3

PHYSICS

2-s2.0-85101477650

Scopus

1.Department of Electrical and Computer Engineering,National University of Singapore,Singapore,4 Engineering Drive 3,117583,Singapore
2.School of Physics and Electronics,Central South University,Changsha,410083,China
3.School of Information Science and Technology,ShanghaiTech University,Shanghai,201210,China
4.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,Xueyuan Rd 1088,518055,China

Wu，Yihong,Xu，Yanjun,Luo，Ziyan,et al. Charge-spin interconversion and its applications in magnetic sensing[J]. JOURNAL OF APPLIED PHYSICS,2021,129(6).

Wu，Yihong.,Xu，Yanjun.,Luo，Ziyan.,Yang，Yumeng.,Xie，Hang.,...&Zhang，Xinhai.(2021).Charge-spin interconversion and its applications in magnetic sensing.JOURNAL OF APPLIED PHYSICS,129(6).

Wu，Yihong,et al."Charge-spin interconversion and its applications in magnetic sensing".JOURNAL OF APPLIED PHYSICS 129.6(2021).