Quantitative investigation of FeMn-based spin-valves by rotating field magnetoresistance measurements

Amitesh Paul; Matthias Buchmeier; Daniel E. Bürgler; Peter Grünberg

doi:10.1016/j.jmmm.2004.09.075

Quantitative investigation of FeMn-based spin-valves by rotating field magnetoresistance measurements

Amitesh Paul, Matthias Buchmeier, Daniel E. Bürgler, Peter Grünberg

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

7 Scopus citations

Abstract

We measure the magnetoresistance of Ta/NiFe/FeMn/NiFe/Co(tCo)/Cu/Co(tCo)/ NiFe spin-valves as a function of field strength and direction. The exchange bias HEB and the giant magnetoresistance depend on the Co thickness tCo, and the resistance shows rotational hysteresis when the external field is close to compensating HEB. A single-domain model reproduces the angular dependence of the magnetoresistance in regions without hysteresis, yields HEB values in agreement with MOKE, and allows one to precisely determine the interlayer coupling and uniaxial anisotropies although they are much weaker than HEB.

Original language	English
Pages (from-to)	258-261
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	286
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jmmm.2004.09.075
State	Published - Feb 2005
Externally published	Yes

Keywords

Exchange bias
Rotational hysteresis
Spin-valve

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abstract = "We measure the magnetoresistance of Ta/NiFe/FeMn/NiFe/Co(tCo)/Cu/Co(tCo)/ NiFe spin-valves as a function of field strength and direction. The exchange bias HEB and the giant magnetoresistance depend on the Co thickness tCo, and the resistance shows rotational hysteresis when the external field is close to compensating HEB. A single-domain model reproduces the angular dependence of the magnetoresistance in regions without hysteresis, yields HEB values in agreement with MOKE, and allows one to precisely determine the interlayer coupling and uniaxial anisotropies although they are much weaker than HEB.",

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T1 - Quantitative investigation of FeMn-based spin-valves by rotating field magnetoresistance measurements

AU - Paul, Amitesh

AU - Buchmeier, Matthias

AU - Bürgler, Daniel E.

AU - Grünberg, Peter

PY - 2005/2

Y1 - 2005/2

N2 - We measure the magnetoresistance of Ta/NiFe/FeMn/NiFe/Co(tCo)/Cu/Co(tCo)/ NiFe spin-valves as a function of field strength and direction. The exchange bias HEB and the giant magnetoresistance depend on the Co thickness tCo, and the resistance shows rotational hysteresis when the external field is close to compensating HEB. A single-domain model reproduces the angular dependence of the magnetoresistance in regions without hysteresis, yields HEB values in agreement with MOKE, and allows one to precisely determine the interlayer coupling and uniaxial anisotropies although they are much weaker than HEB.

AB - We measure the magnetoresistance of Ta/NiFe/FeMn/NiFe/Co(tCo)/Cu/Co(tCo)/ NiFe spin-valves as a function of field strength and direction. The exchange bias HEB and the giant magnetoresistance depend on the Co thickness tCo, and the resistance shows rotational hysteresis when the external field is close to compensating HEB. A single-domain model reproduces the angular dependence of the magnetoresistance in regions without hysteresis, yields HEB values in agreement with MOKE, and allows one to precisely determine the interlayer coupling and uniaxial anisotropies although they are much weaker than HEB.

KW - Exchange bias

KW - Rotational hysteresis

KW - Spin-valve

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DO - 10.1016/j.jmmm.2004.09.075

M3 - 文章

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

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