Flipping magnetization induced by noncollinear ferromagnetic- antiferromagnetic exchange coupling

Bo-Yao Wang, C. H. Chuang, S. S. Wong, J. J. Chiou, W. C. Lin, Y. L. Chan, D. H. Wei, Minn Tsong Lin

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We present a direct observation of a flipping magnetization of a uniform Fe film/wedged-Mn bilayer induced by a biquadratic-type exchange coupling established at the interface. The element-resolved magnetic imaging shows that the Fe film exhibited a flipping of magnetization between the [1̄00] and [010] directions with a periodicity of one monolayer Mn thickness as below a critical temperature. The enhancement of the variation angle with the increase of Mn thickness follows the tendency of the finite-size effect of antiferromagnetism on interface exchange coupling. The flipping magnetization emerging coincidentally with the uncompensated-compensated transition of Mn magnetic surface indicates a frustration-induced biquadratic-type interface exchange coupling, and suggests a layered-like uncompensated AFM ordering for the Mn layer.

Original languageEnglish
Article number094412
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number9
DOIs
Publication statusPublished - 2012 Mar 7

Fingerprint

Exchange coupling
Magnetization
magnetization
Antiferromagnetism
antiferromagnetism
frustration
periodic variations
emerging
Monolayers
critical temperature
tendencies
atomic force microscopy
Imaging techniques
augmentation
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Wang, Bo-Yao ; Chuang, C. H. ; Wong, S. S. ; Chiou, J. J. ; Lin, W. C. ; Chan, Y. L. ; Wei, D. H. ; Lin, Minn Tsong. / Flipping magnetization induced by noncollinear ferromagnetic- antiferromagnetic exchange coupling. In: Physical Review B - Condensed Matter and Materials Physics. 2012 ; Vol. 85, No. 9.
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Flipping magnetization induced by noncollinear ferromagnetic- antiferromagnetic exchange coupling. / Wang, Bo-Yao; Chuang, C. H.; Wong, S. S.; Chiou, J. J.; Lin, W. C.; Chan, Y. L.; Wei, D. H.; Lin, Minn Tsong.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 9, 094412, 07.03.2012.

Research output: Contribution to journalArticle

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AB - We present a direct observation of a flipping magnetization of a uniform Fe film/wedged-Mn bilayer induced by a biquadratic-type exchange coupling established at the interface. The element-resolved magnetic imaging shows that the Fe film exhibited a flipping of magnetization between the [1̄00] and [010] directions with a periodicity of one monolayer Mn thickness as below a critical temperature. The enhancement of the variation angle with the increase of Mn thickness follows the tendency of the finite-size effect of antiferromagnetism on interface exchange coupling. The flipping magnetization emerging coincidentally with the uncompensated-compensated transition of Mn magnetic surface indicates a frustration-induced biquadratic-type interface exchange coupling, and suggests a layered-like uncompensated AFM ordering for the Mn layer.

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