Exchange bias in ferromagnetic bilayers with orthogonal anisotropies

the case of GaMnAsP/GaMnAs combination

Suho Choi, Seul Ki Bac, Xinyu Liu, Sang Hoon Lee, Sining Dong, M. Dobrowolska, J. K. Furdyna

Research output: Contribution to journalArticle

Abstract

We report the observation of exchange bias in a ferromagnetic Ga0.94Mn0.06As0.77P0.23/ Ga0.94Mn0.06As 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.

Original languageEnglish
Number of pages1
JournalScientific reports
Volume9
Issue number1
DOIs
Publication statusPublished - 2019 Sep 10

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Exchange bias in ferromagnetic bilayers with orthogonal anisotropies : the case of GaMnAsP/GaMnAs combination. / Choi, Suho; Bac, Seul Ki; Liu, Xinyu; Lee, Sang Hoon; Dong, Sining; Dobrowolska, M.; Furdyna, J. K.

In: Scientific reports, Vol. 9, No. 1, 10.09.2019.

Research output: Contribution to journalArticle

Choi, Suho ; Bac, Seul Ki ; Liu, Xinyu ; Lee, Sang Hoon ; Dong, Sining ; Dobrowolska, M. ; Furdyna, J. K. / Exchange bias in ferromagnetic bilayers with orthogonal anisotropies : the case of GaMnAsP/GaMnAs combination. In: Scientific reports. 2019 ; Vol. 9, No. 1.
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AU - Lee, Sang Hoon

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AU - Dobrowolska, M.

AU - Furdyna, J. K.

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