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 M54: Emergent Properties of Complex Oxides Bulk, Thin Films, and Heterostructures III
8:00 AM–10:48 AM,
Wednesday, March 8, 2023
Room: Room 306
Sponsoring
Unit:
GMAG
Chair: Anand Battacharya, Argonne National Laboratory
Abstract: M54.00010 : Engineering Easy-plane Anisotropy in Ferrimagnetic Rare-earth Iron Garnet*
10:12 AM–10:24 AM
Presenter:
Yixuan Song
(Massachusetts Institute of Technology)
Authors:
Yixuan Song
(Massachusetts Institute of Technology)
Geoffrey S Beach
(Massachusetts Institute of Technology MIT)
Caroline A Ross
(Massachusetts Institute of Technology MIT)
The angular dependence of anisotropy is calculated by combining the individual contributions including magnetocrystalline anisotropy, magnetoelastic anisotropy, shape anisotropy and growth-induced anisotropy, which may contribute for non-ideal stoichiometry. This predicts an easy axis out of plane along [110], with hard and intermediate axes in plane along [001] and [-110] respectively. The anisotropy landscape is probed with vibrating sample magnetometry (VSM) and spin-Hall magnetoresistance (SMR) measurements. The SMR result is simulated and fitted to a Stoner-Wohlfarth model. The experimental measurements yield the expected hard and easy axes, The unexpected hysteresis when external magnetic field is swept along the intermediate anisotropy axis is well explained by the modification of anisotropy landscape by the cubic symmetric magneto-crystalline anisotropy. Both the in-plane anisotropy and out-of-plane anisotropy are shown to be tuned with film thickness, with a change in easy-axis from [110] to [-110] with increasing thickness. Understanding and control of this anisotropy landscape could enable many possible fundamental studies and applications.
*NSF and the SMART Center supported by SRC
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