Exchange bias in ferromagnetic bilayers with orthogonal anisotropies: the case of GaMnAsP/GaMnAs combination

We report the observation of exchange bias in a ferromagnetic Ga 0.94 Mn 0.06 As 0.77 P 0.23 / Ga 0.94 Mn 0.06 As bilayer, in which the easy axis in one layer is oriented out-of-plane, and in the other in-plane. Magnetization reversal in this system is explored using planar Hall effect (PHE) measure...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2019-09, Vol.9 (1), p.13061-7, Article 13061
Main Authors: Choi, Suho, Bac, Seul-Ki, Liu, Xinyu, Lee, Sanghoon, Dong, Sining, Dobrowolska, M., Furdyna, J. K.
Format: Article
Language:English
Subjects:
639/301/119/1000
639/301/119/1001
639/301/119/2793
639/301/119/544
639/301/119/997
Bias
Humanities and Social Sciences
multidisciplinary
Science
Science (multidisciplinary)
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:We report the observation of exchange bias in a ferromagnetic Ga 0.94 Mn 0.06 As 0.77 P 0.23 / Ga 0.94 Mn 0.06 As bilayer, in which the easy axis in one layer is oriented out-of-plane, and in the other in-plane. Magnetization reversal in this system is explored using planar Hall effect (PHE) measurements under various initial conditions and with various field-cooling orientations. Our results show that the two magnetic layers are ferromagnetically exchange-coupled, and that such coupling results in pronounced exchange-bias-like shifts of magnetic hysteresis loops during reversal of in-plane magnetization. The presence of exchange bias in this system can be understood on the basis of magnetic closure domains formed in the layer with the out-of-plane easy axis.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-49492-4