How antiferromagnetism drives the magnetization of a ferromagnetic thin film to align out of plane

Bo Yao Wang, Jhen Yong Hong, Kui Hon Ou Yang, Yuet Loy Chan, Der Hsin Wei, Hong Ji Lin, Minn Tsong Lin

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Interfacial moments of an antiferromagnet are known for their prominent effects of induced coercivity enhancement and exchange bias in ferromagnetic-antiferromagnetic exchange-coupled systems. Here we report that the unpinned moments of an antiferromagnetic face-centered-cubic Mn layer can drive the magnetization of an adjacent Fe film perpendicular owing to a formation of intrinsic perpendicular anisotropy. X-ray magnetic circular dichroism and hysteresis loops show establishment of perpendicular magnetization on Fe/Mn bilayers while temperature was decreased. The fact that the magnitude of perpendicular anisotropy of the Fe layer is enhanced proportionally to the out-of-plane oriented orbital moment of the Mn unpinned layer, rather than that of Fe itself, gives evidence for the Mn unpinned moments to be the origin of the established perpendicular magnetization.

Original languageEnglish
Article number117203
JournalPhysical Review Letters
Volume110
Issue number11
DOIs
Publication statusPublished - 2013 Mar 12

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antiferromagnetism
moments
magnetization
thin films
anisotropy
dichroism
coercivity
hysteresis
orbitals
augmentation
x rays
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Wang, Bo Yao ; Hong, Jhen Yong ; Yang, Kui Hon Ou ; Chan, Yuet Loy ; Wei, Der Hsin ; Lin, Hong Ji ; Lin, Minn Tsong. / How antiferromagnetism drives the magnetization of a ferromagnetic thin film to align out of plane. In: Physical Review Letters. 2013 ; Vol. 110, No. 11.
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How antiferromagnetism drives the magnetization of a ferromagnetic thin film to align out of plane. / Wang, Bo Yao; Hong, Jhen Yong; Yang, Kui Hon Ou; Chan, Yuet Loy; Wei, Der Hsin; Lin, Hong Ji; Lin, Minn Tsong.

In: Physical Review Letters, Vol. 110, No. 11, 117203, 12.03.2013.

Research output: Contribution to journalArticle

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AU - Wang, Bo Yao

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AU - Wei, Der Hsin

AU - Lin, Hong Ji

AU - Lin, Minn Tsong

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AB - Interfacial moments of an antiferromagnet are known for their prominent effects of induced coercivity enhancement and exchange bias in ferromagnetic-antiferromagnetic exchange-coupled systems. Here we report that the unpinned moments of an antiferromagnetic face-centered-cubic Mn layer can drive the magnetization of an adjacent Fe film perpendicular owing to a formation of intrinsic perpendicular anisotropy. X-ray magnetic circular dichroism and hysteresis loops show establishment of perpendicular magnetization on Fe/Mn bilayers while temperature was decreased. The fact that the magnitude of perpendicular anisotropy of the Fe layer is enhanced proportionally to the out-of-plane oriented orbital moment of the Mn unpinned layer, rather than that of Fe itself, gives evidence for the Mn unpinned moments to be the origin of the established perpendicular magnetization.

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