Flipping magnetization induced by noncollinear ferromagnetic- antiferromagnetic exchange coupling

B. Y. Wang; C. H. Chuang; S. S. Wong; J. J. Chiou; W. C. Lin; Y. L. Chan; D. H. Wei; Minn Tsong Lin

doi:10.1103/PhysRevB.85.094412

Flipping magnetization induced by noncollinear ferromagnetic- antiferromagnetic exchange coupling

B. Y. Wang^*, C. H. Chuang, S. S. Wong, J. J. Chiou, W. C. Lin, Y. L. Chan, D. H. Wei, Minn Tsong Lin

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

13 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 language	English
Article number	094412
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.85.094412
Publication status	Published - 2012 Mar 7

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.85.094412

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title = "Flipping magnetization induced by noncollinear ferromagnetic- antiferromagnetic exchange coupling",

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 [{\=1}00] 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.",

author = "Wang, {B. Y.} and Chuang, {C. H.} and Wong, {S. S.} and Chiou, {J. J.} and Lin, {W. C.} and Chan, {Y. L.} and Wei, {D. H.} and Lin, {Minn Tsong}",

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T1 - Flipping magnetization induced by noncollinear ferromagnetic- antiferromagnetic exchange coupling

AU - Wang, B. Y.

AU - Chuang, C. H.

AU - Wong, S. S.

AU - Chiou, J. J.

AU - Lin, W. C.

AU - Chan, Y. L.

AU - Wei, D. H.

AU - Lin, Minn Tsong

PY - 2012/3/7

Y1 - 2012/3/7

N2 - 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.

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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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 9

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Flipping magnetization induced by noncollinear ferromagnetic- antiferromagnetic exchange coupling

Abstract

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