Antiferromagnetic relaxation and induced anisotropy in Fe/twinned-PtMn bilayers

A. Mougin; J. Borme; Robert Stamps; A. Marty; G. Bale-Guillemaud; Y. Samson; J. Ferre

doi:10.1103/PhysRevB.73.024401

Antiferromagnetic relaxation and induced anisotropy in Fe/twinned-PtMn bilayers

A. Mougin, J. Borme, Robert Stamps, A. Marty, G. Bale-Guillemaud, Y. Samson, J. Ferre

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6 Citations (Scopus)

Abstract

We report the observation of unusual magnetic anisotropies in epitaxially grown Fe layers on PtMn films. The antiferromagnetic PtMn film has a twinned structure with crystallites of 8 nm. Each single PtMn grain is chemically ordered and exhibits a twofold magnetocrystalline anisotropy with an uncompensated surface magnetization. The bilayers display hysteresis with a complex dependence on applied field angle. A three vector model predicts the angular dependence of the hysteresis loops (shift and shape) of the Fe film and gives a detailed understanding of the Fe and antiferromagnet spin orientations during reversal. The interface exchange coupling between the Fe and the uncoupled PtMn twins accounts for the asymmetric magnetization reversal and high order anisotropies.

Original language	English
Pages (from-to)	1-5
Journal	Physical Review B
Volume	73
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.73.024401
Publication status	Published - 2006

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title = "Antiferromagnetic relaxation and induced anisotropy in Fe/twinned-PtMn bilayers",

abstract = "We report the observation of unusual magnetic anisotropies in epitaxially grown Fe layers on PtMn films. The antiferromagnetic PtMn film has a twinned structure with crystallites of 8 nm. Each single PtMn grain is chemically ordered and exhibits a twofold magnetocrystalline anisotropy with an uncompensated surface magnetization. The bilayers display hysteresis with a complex dependence on applied field angle. A three vector model predicts the angular dependence of the hysteresis loops (shift and shape) of the Fe film and gives a detailed understanding of the Fe and antiferromagnet spin orientations during reversal. The interface exchange coupling between the Fe and the uncoupled PtMn twins accounts for the asymmetric magnetization reversal and high order anisotropies.",

author = "A. Mougin and J. Borme and Robert Stamps and A. Marty and G. Bale-Guillemaud and Y. Samson and J. Ferre",

year = "2006",

doi = "10.1103/PhysRevB.73.024401",

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T1 - Antiferromagnetic relaxation and induced anisotropy in Fe/twinned-PtMn bilayers

AU - Mougin, A.

AU - Borme, J.

AU - Stamps, Robert

AU - Marty, A.

AU - Bale-Guillemaud, G.

AU - Samson, Y.

AU - Ferre, J.

PY - 2006

Y1 - 2006

N2 - We report the observation of unusual magnetic anisotropies in epitaxially grown Fe layers on PtMn films. The antiferromagnetic PtMn film has a twinned structure with crystallites of 8 nm. Each single PtMn grain is chemically ordered and exhibits a twofold magnetocrystalline anisotropy with an uncompensated surface magnetization. The bilayers display hysteresis with a complex dependence on applied field angle. A three vector model predicts the angular dependence of the hysteresis loops (shift and shape) of the Fe film and gives a detailed understanding of the Fe and antiferromagnet spin orientations during reversal. The interface exchange coupling between the Fe and the uncoupled PtMn twins accounts for the asymmetric magnetization reversal and high order anisotropies.

AB - We report the observation of unusual magnetic anisotropies in epitaxially grown Fe layers on PtMn films. The antiferromagnetic PtMn film has a twinned structure with crystallites of 8 nm. Each single PtMn grain is chemically ordered and exhibits a twofold magnetocrystalline anisotropy with an uncompensated surface magnetization. The bilayers display hysteresis with a complex dependence on applied field angle. A three vector model predicts the angular dependence of the hysteresis loops (shift and shape) of the Fe film and gives a detailed understanding of the Fe and antiferromagnet spin orientations during reversal. The interface exchange coupling between the Fe and the uncoupled PtMn twins accounts for the asymmetric magnetization reversal and high order anisotropies.

U2 - 10.1103/PhysRevB.73.024401

DO - 10.1103/PhysRevB.73.024401

M3 - Article

SN - 1098-0121

VL - 73

SP - 1

EP - 5

JO - Physical Review B

JF - Physical Review B

IS - 2

ER -

Antiferromagnetic relaxation and induced anisotropy in Fe/twinned-PtMn bilayers

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