Polarized neutron scattering from polycrystalline, exchange-biased magnetic multilayers

Amitesh Paul; Emmanuel Kentzinger; Ulrich Rücker; Daniel E. Bürgler; Peter Grünberg

doi:10.1016/j.physb.2004.10.039

Polarized neutron scattering from polycrystalline, exchange-biased magnetic multilayers

Amitesh Paul^*, Emmanuel Kentzinger, Ulrich Rücker, Daniel E. Bürgler, Peter Grünberg

^*Corresponding author for this work

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

3 Scopus citations

Abstract

Specular reflection and off-specular scattering of polarized neutron has been used to study the magnetization reversal in polycrystalline [Ir20Mn80/Co80Fe20]N=3 exchange-biased multilayers. The reversal proceeds sequentially starting from the bottom (top) CoFe layer for decreasing (increasing) field. This behavior is related to the evolution of the grain size along the stack. The reversal of each CoFe layer is due to domain wall motions for both the decreasing and increasing field branch. The reversals are accompanied by fluctuations of the in-plane magnetization component perpendicular to the external field as evidenced by off-specular spin-flip scattering. The observed reversal mode is very similar to that of [Ir20Mn80/Co80Fe20]N multilayers with N=10 although the grain size decreases from N=3 to 10 by a factor of about four.

Original language	English
Pages (from-to)	26-30
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	356
Issue number	1-4 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2004.10.039
State	Published - 15 Feb 2005
Externally published	Yes

Keywords

Exchange bias
Magnetization reversal mechanisms
Off-specular scattering
Polarized neutron reflectometry

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title = "Polarized neutron scattering from polycrystalline, exchange-biased magnetic multilayers",

abstract = "Specular reflection and off-specular scattering of polarized neutron has been used to study the magnetization reversal in polycrystalline [Ir20Mn80/Co80Fe20]N=3 exchange-biased multilayers. The reversal proceeds sequentially starting from the bottom (top) CoFe layer for decreasing (increasing) field. This behavior is related to the evolution of the grain size along the stack. The reversal of each CoFe layer is due to domain wall motions for both the decreasing and increasing field branch. The reversals are accompanied by fluctuations of the in-plane magnetization component perpendicular to the external field as evidenced by off-specular spin-flip scattering. The observed reversal mode is very similar to that of [Ir20Mn80/Co80Fe20]N multilayers with N=10 although the grain size decreases from N=3 to 10 by a factor of about four.",

keywords = "Exchange bias, Magnetization reversal mechanisms, Off-specular scattering, Polarized neutron reflectometry",

author = "Amitesh Paul and Emmanuel Kentzinger and Ulrich R{\"u}cker and B{\"u}rgler, {Daniel E.} and Peter Gr{\"u}nberg",

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AU - Paul, Amitesh

AU - Kentzinger, Emmanuel

AU - Rücker, Ulrich

AU - Bürgler, Daniel E.

AU - Grünberg, Peter

PY - 2005/2/15

Y1 - 2005/2/15

N2 - Specular reflection and off-specular scattering of polarized neutron has been used to study the magnetization reversal in polycrystalline [Ir20Mn80/Co80Fe20]N=3 exchange-biased multilayers. The reversal proceeds sequentially starting from the bottom (top) CoFe layer for decreasing (increasing) field. This behavior is related to the evolution of the grain size along the stack. The reversal of each CoFe layer is due to domain wall motions for both the decreasing and increasing field branch. The reversals are accompanied by fluctuations of the in-plane magnetization component perpendicular to the external field as evidenced by off-specular spin-flip scattering. The observed reversal mode is very similar to that of [Ir20Mn80/Co80Fe20]N multilayers with N=10 although the grain size decreases from N=3 to 10 by a factor of about four.

AB - Specular reflection and off-specular scattering of polarized neutron has been used to study the magnetization reversal in polycrystalline [Ir20Mn80/Co80Fe20]N=3 exchange-biased multilayers. The reversal proceeds sequentially starting from the bottom (top) CoFe layer for decreasing (increasing) field. This behavior is related to the evolution of the grain size along the stack. The reversal of each CoFe layer is due to domain wall motions for both the decreasing and increasing field branch. The reversals are accompanied by fluctuations of the in-plane magnetization component perpendicular to the external field as evidenced by off-specular spin-flip scattering. The observed reversal mode is very similar to that of [Ir20Mn80/Co80Fe20]N multilayers with N=10 although the grain size decreases from N=3 to 10 by a factor of about four.

KW - Exchange bias

KW - Magnetization reversal mechanisms

KW - Off-specular scattering

KW - Polarized neutron reflectometry

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