Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Spin-orbit torque from a ferromagnetic metal

Journal Article · · Physical Review B
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2]
  1. Univ. of California, Los Angeles, CA (United States); DOE/OSTI
  2. Univ. of California, Los Angeles, CA (United States)

The switching of magnetization by current-induced spin-orbit torque (SOT) has potential applications for energy-efficient spintronic devices. In the past, most conventional works have been focused on SOT in heavy metals. Here the SOT from a ferromagnetic metal is investigated, and two mechanisms of the field-free SOT induced magnetization switching are demonstrated to be from the interlayer exchange coupling and the tilted perpendicular magnetic anisotropy. We exclude the spin torque contribution from the anomalous Hall effect and the interfacial Rashba effect combined with spin precession. A spin Hall angle θSH = –0.022 of CoFeB is obtained by the current-induced hysteresis loop shift method, and the obtained θSH is comparable with heavy metals. This work demonstrates that a considerable SOT can come from a ferromagnetic metal, and indicates the unconventional origin of spin-orbit coupling.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Riverside, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012670
OSTI ID:
1611919
Alternate ID(s):
OSTI ID: 1510833
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 18 Vol. 99; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (59)

Strong Rashba-Edelstein Effect-Induced Spin–Orbit Torques in Monolayer Transition Metal Dichalcogenide/Ferromagnet Bilayers journal November 2016
Electrical detection of spin precession in a metallic mesoscopic spin valve journal April 2002
Direct electronic measurement of the spin Hall effect journal July 2006
Electronic spin transport and spin precession in single graphene layers at room temperature journal July 2007
Perpendicular switching of a single ferromagnetic layer induced by in-plane current injection journal August 2011
Field-free magnetization reversal by spin-Hall effect and exchange bias journal March 2016
Magnetization switching through giant spin–orbit torque in a magnetically doped topological insulator heterostructure journal April 2014
Magnetization switching by spin–orbit torque in an antiferromagnet–ferromagnet bilayer system journal February 2016
Switching of perpendicular magnetization by spin–orbit torques in the absence of external magnetic fields journal May 2014
Field-free switching of perpendicular magnetization through spin–orbit torque in antiferromagnet/ferromagnet/oxide structures journal July 2016
Spin–orbit torque switching without an external field using interlayer exchange coupling journal May 2016
Spin currents and spin–orbit torques in ferromagnetic trilayers journal March 2018
Twisting the thermoelectric potential journal January 2021
Deterministic Spin-Orbit Torque Induced Magnetization Reversal In Pt/[Co/Ni] n /Co/Ta Multilayer Hall Bars journal April 2017
Spin-transfer torque induced by the spin anomalous Hall effect journal February 2018
Unambiguous separation of the inverse spin Hall and anomalous Nernst effects within a ferromagnetic metal using the spin Seebeck effect journal September 2014
Antiferromagnetically coupled perpendicular magnetic anisotropic CoFeB/MgO films across a Mo spacer with high thermal stability journal October 2015
Perpendicular magnetization reversal in Pt/[Co/Ni] 3 /Al multilayers via the spin Hall effect of Pt journal February 2016
Field-free spin Hall effect driven magnetization switching in Pd/Co/IrMn exchange coupling system journal September 2016
Switching of perpendicularly polarized nanomagnets with spin orbit torque without an external magnetic field by engineering a tilted anisotropy journal August 2015
Spin-Transfer Torques Generated by the Anomalous Hall Effect and Anisotropic Magnetoresistance journal April 2015
Spin-Orbit-Torque Efficiency in Compensated Ferrimagnetic Cobalt-Terbium Alloys journal November 2016
Joule Heating Effect on Field-Free Magnetization Switching by Spin-Orbit Torque in Exchange-Biased Systems journal February 2017
Transport theory for disordered multiple-band systems: Anomalous Hall effect and anisotropic magnetoresistance journal May 2009
Detection and quantification of inverse spin Hall effect from spin pumping in permalloy/normal metal bilayers journal December 2010
Spin Hall angle quantification from spin pumping and microwave photoresistance journal June 2012
Quantitative characterization of the spin-orbit torque using harmonic Hall voltage measurements journal April 2014
Observation of pure inverse spin Hall effect in ferromagnetic metals via ferromagnetic/antiferromagnetic exchange-bias structures journal August 2015
Determination of spin torque efficiencies in heterostructures with perpendicular magnetic anisotropy journal April 2016
Spin transport at interfaces with spin-orbit coupling: Formalism journal September 2016
Spin transport at interfaces with spin-orbit coupling: Phenomenology journal September 2016
Hanle magnetoresistance: The role of edge spin accumulation and interfacial spin current journal November 2016
Spin injection and detection via the anomalous spin Hall effect of a ferromagnetic metal journal December 2017
Giant spin-torque generation by heavily oxidized Pt journal July 2018
Quantifying Spin Hall Angles from Spin Pumping: Experiments and Theory journal January 2010
Current-Induced Switching of Perpendicularly Magnetized Magnetic Layers Using Spin Torque from the Spin Hall Effect journal August 2012
Inverse Spin Hall Effect in a Ferromagnetic Metal journal August 2013
Room-Temperature Spin-Orbit Torque Switching Induced by a Topological Insulator journal August 2017
Strong Enhancement of the Spin Hall Effect by Spin Fluctuations near the Curie Point of Fe x Pt 1 − x Alloys journal March 2018
Spin Hall Effect journal August 1999
Spin Hall Effect in the Presence of Spin Diffusion journal July 2000
Anomalous Hall effect journal May 2010
Spin Hall effects journal October 2015
Anisotropic magnetoresistance in ferromagnetic 3d alloys journal July 1975
Current-induced magnetization switching using an electrically insulating spin-torque generator journal February 2018
Observation of the Spin Hall Effect in Semiconductors journal December 2004
Spin-Torque Switching with the Giant Spin Hall Effect of Tantalum journal May 2012
Spin hall Effect journal April 2006
Electronic spin transport and spin precession in single graphene layers at room temperature text January 2007
Quantifying spin Hall angles from spin pumping: Experiments and Theory text January 2009
Detection and quantification of inverse spin Hall effect from spin pumping in permalloy/normal metal bilayers text January 2010
Unambiguous separation of the inverse spin Hall and anomalous Nernst Effects within a ferromagnetic metal using the spin Seebeck effect text January 2014
Magnetization switching by spin-orbit torque in an antiferromagnet/ferromagnet bilayer system text January 2015
Field-free magnetization reversal by spin-Hall effect and exchange bias text January 2015
Room temperature spin-orbit torque switching induced by a topological insulator text January 2017
Spin Injection and Detection via the Anomalous Spin Hall Effect in a Ferromagnetic Metal text January 2017
Strong Rashba-Edelstein Effect-Induced Spin-Orbit Torques in Monolayer Transition-Metal Dichalcogenide/Ferromagnet Bilayers text January 2018
Direct electronic measurement of the spin Hall effect text January 2006
Spin Hall effect text January 1999

Cited By (2)

Determining spin-torque efficiency in ferromagnetic metals via spin-torque ferromagnetic resonance journal February 2020
Structural, magnetostatic, and magnetodynamic studies of Co/Mo-based uncompensated synthetic antiferromagnets journal December 2019