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This content will become publicly available on March 7, 2016

Title: Spin Hall effects in metallic antiferromagnets – perspectives for future spin-orbitronics

In this paper, we investigate angular dependent spin-orbit torques from the spin Hall effect in a metallic antiferromagnet using the spin-torque ferromagnetic resonance technique. The large spin Hall effect exists in PtMn, a prototypical CuAu-I-type metallic antiferromagnet. By applying epitaxial growth, we previously reported an appreciable difference in spin-orbit torques for c- and a-axis orientated samples, implying anisotropic effects in magnetically ordered materials. In this work we demonstrate through bipolar-magnetic-field experiments a small but noticeable asymmetric behavior in the spin-transfer-torque that appears as a hysteresis effect. Finally, we also suggest that metallic antiferromagnets may be good candidates for the investigation of various unidirectional effects related to novel spin-orbitronics phenomena.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [3] ;  [2] ; ORCiD logo [4] ;  [2]
  1. Argonne National Lab. (ANL), Lemont, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Department of Physics and Astronomy
  2. Argonne National Lab. (ANL), Lemont, IL (United States). Materials Science Division
  3. Argonne National Lab. (ANL), Lemont, IL (United States). Materials Science Division; Illinois Inst. of Technology, Chicago, IL (United States). Department of Physics
  4. Northwestern Univ., Evanston, IL (United States). Department of Physics and Astronomy
Publication Date:
OSTI Identifier:
1240471
Grant/Contract Number:
AC02-06CH11357; SC0014424
Type:
Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 5; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY