The interplay between magneto-electricity (ME) and magneto-elasticity (MEL) is studied in the context of voltage-controlled magnetic anisotropy (VCMA). Strain plays more than a role of changing lattice constant but 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 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, magneto-crystalline anisotropy (MA) is analyzed with strain taken into account, where non-linear feature is presented only accountable by invoking second-order MEL.
@article{arxiv.2001.01464,
title = {Enhanced voltage-controlled magnetic anisotropy via magneto-elasticity in FePt/MgO(001)},
author = {Qurat-ul-ain and Dorj Odkhuu and S. H. Rhim and Soon Cheol Hong},
journal= {arXiv preprint arXiv:2001.01464},
year = {2020}
}