A Dzyaloshinskii-Moriya Anisotropy in Nanomagnets with in-plane Magnetization

Authors :: Cubukcu, M.
Sampaio, J.
Bouzehouane, K.
Apalkov, D.
Khvalkovskiy, A. V.
Cros, V.
Reyren, N.
Source :: Phys. Rev. B 93, 020401(R) (2016) [Note that the PRB paper has changes.]
Publication Year :: 2015
Abstract: We report on a new source of in-plane anisotropy in nanomagnets due to the presence of Dzyaloshinskii-Moriya interaction (DMI). This anisotropy depends on the shape of the magnet, and is orthogonal to the demagnetization shape anisotropy. This effect originates from the DMI energy reduction due to an out-of-plane tilt of the spins at edges oriented perpendicular to the magnetization. Our investigation combining experimental, numerical and analytical results demonstrate that this energy reduction can compensate the demagnetization shape anisotropy energy in magnets of elongated shape, provided that their volumes is small enough and thus that their magnetization is quasi-uniform.<br />Comment: 5 pages, 4 figures

Database :: arXiv
Journal :: Phys. Rev. B 93, 020401(R) (2016) [Note that the PRB paper has changes.]
Publication Type :: Report
Accession number :: edsarx.1508.02961
Document Type :: Working Paper
Full Text :: https://doi.org/10.1103/PhysRevB.93.020401