Loading…

Enhanced voltage-controlled magnetic anisotropy via magnetoelasticity in FePt/MgO(001)

The interplay between magnetoelectricity and magnetoelasticity (MEL) is studied in the context of voltage-controlled magnetic anisotropy (VCMA). Strain plays more than the role of changing lattice constants-that of the internal electric field in the heterostructure. As a prototype, FePt/MgO(001) is...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B 2020-06, Vol.101 (21), Article 214436
Main Authors: Qurat-ul-ain, Odkhuu, D., Rhim, S. H., Hong, S. C.
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The interplay between magnetoelectricity and magnetoelasticity (MEL) is studied in the context of voltage-controlled magnetic anisotropy (VCMA). Strain plays more than the role of changing lattice constants-that of the internal electric field in the heterostructure. As a prototype, FePt/MgO(001) is visited, where the behavior of two interfaces are drastically different: one exhibits switching, the other does not. Whether an external electric field (Eext) is present or not, we found the VCMA coefficient larger than 1 pJ / ( V m ) as a consequence of the rearrangement of d orbitals with m = ± 1 and ± 2 in response to an external electric field. In addition, magnetocrystalline anisotropy is analyzed with strain taken into account, where a nonlinear feature is presented, only accountable by invoking second-order MEL.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.101.214436