Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session K55: Nanomagnetic Core Shell Structures and Antiferromagnetic Systems
3:00 PM–5:36 PM,
Tuesday, March 7, 2023
Room: Room 305
Sponsoring
Units:
GMAG DMP
Chair: Abdelghani Laraoui, University of Nebraska - Lincoln
Abstract: K55.00012 : Strain effect on magnetocrystalline anisotropy of Fe2As from first principles*
5:12 PM–5:24 PM
Presenter:
Junehu Park
(University of Illinois, Urbana-Champaign)
Authors:
Junehu Park
(University of Illinois, Urbana-Champaign)
Andre Schleife
(UIUC)
Without strain, out-of-plane MCA reached up to 600μeV and in-plane was 100 times smaller. Small in-plane MCA facilitates spin switching by requiring less magnetic field in experiments. We then tested uni-axially strained structures with strains picked between -1% and 1%. The out-of-plane MCA as function of spin angle showed 2-fold symmetry with and without strain. We extract a linear relationship between MCA and strain, leading to an increase of MCA by about 57μeV per 1% tensile strain.
This linearity can predict amount of compressive strain to lower the magnetic domain switching energy barrier. To reduce out-of-plane energy barrier by half, -5% strain is estimated. Further investigation in in-plane MCA would enable stabilization of domain switching in experiments by increasing the energy barrier with strain.
*The Illinois Materials Research Science and Engineering Center is supported by NSF Award Number DMR-1720633.
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