Effect of an antiferromagnetic layer on the temperature dependence of coercivity in biased FeMn/Co systems

J. Wang; W. N. Wang; X. Chen; H. W. Zhao; J. G. Zhao; W. S. Zhan

doi:10.1063/1.1353808

Effect of an antiferromagnetic layer on the temperature dependence of coercivity in biased FeMn/Co systems

J. Wang, W. N. Wang, X. Chen, H. W. Zhao, J. G. Zhao, W. S. Zhan

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Abstract

The hysteresis loops of exchange-biased FeMn/Co bilayers have been measured by means of a superconducting quantum interference device magnetometer. The obtained right and left coercivities exhibit different temperature dependences. With temperature increasing, the left coercivity monotonously increases while the right one remains almost constant until a critical temperature T_i. Upon decreasing the thickness of the antiferromagnet (AF) layer, T_i decreases. The asymmetric behavior of the right and left coercivities indicates that the reversal mechanisms are different for increasing and decreasing field. By taking into account the temperature dependence of the spin alignment in the AF layer, the unusual asymmetric behavior is well explained.

Original language	English (US)
Pages (from-to)	3897-3899
Number of pages	3
Journal	Journal of Applied Physics
Volume	89
Issue number	7
DOIs	https://doi.org/10.1063/1.1353808
State	Published - Apr 1 2001
Externally published	Yes

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title = "Effect of an antiferromagnetic layer on the temperature dependence of coercivity in biased FeMn/Co systems",

abstract = "The hysteresis loops of exchange-biased FeMn/Co bilayers have been measured by means of a superconducting quantum interference device magnetometer. The obtained right and left coercivities exhibit different temperature dependences. With temperature increasing, the left coercivity monotonously increases while the right one remains almost constant until a critical temperature Ti. Upon decreasing the thickness of the antiferromagnet (AF) layer, Ti decreases. The asymmetric behavior of the right and left coercivities indicates that the reversal mechanisms are different for increasing and decreasing field. By taking into account the temperature dependence of the spin alignment in the AF layer, the unusual asymmetric behavior is well explained.",

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T1 - Effect of an antiferromagnetic layer on the temperature dependence of coercivity in biased FeMn/Co systems

AU - Wang, J.

AU - Wang, W. N.

AU - Chen, X.

AU - Zhao, H. W.

AU - Zhao, J. G.

AU - Zhan, W. S.

PY - 2001/4/1

Y1 - 2001/4/1

N2 - The hysteresis loops of exchange-biased FeMn/Co bilayers have been measured by means of a superconducting quantum interference device magnetometer. The obtained right and left coercivities exhibit different temperature dependences. With temperature increasing, the left coercivity monotonously increases while the right one remains almost constant until a critical temperature Ti. Upon decreasing the thickness of the antiferromagnet (AF) layer, Ti decreases. The asymmetric behavior of the right and left coercivities indicates that the reversal mechanisms are different for increasing and decreasing field. By taking into account the temperature dependence of the spin alignment in the AF layer, the unusual asymmetric behavior is well explained.

AB - The hysteresis loops of exchange-biased FeMn/Co bilayers have been measured by means of a superconducting quantum interference device magnetometer. The obtained right and left coercivities exhibit different temperature dependences. With temperature increasing, the left coercivity monotonously increases while the right one remains almost constant until a critical temperature Ti. Upon decreasing the thickness of the antiferromagnet (AF) layer, Ti decreases. The asymmetric behavior of the right and left coercivities indicates that the reversal mechanisms are different for increasing and decreasing field. By taking into account the temperature dependence of the spin alignment in the AF layer, the unusual asymmetric behavior is well explained.

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JF - Journal of Applied Physics

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Effect of an antiferromagnetic layer on the temperature dependence of coercivity in biased FeMn/Co systems

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