A study of interlayer exchange coupling in a Co/Cr/Co trilayer using transmission electron microscopy

A. C. Daykin; J. P. Jakubovics; A. K. Petford-Long

doi:10.1063/1.366054

A study of interlayer exchange coupling in a Co/Cr/Co trilayer using transmission electron microscopy

A. C. Daykin^*, J. P. Jakubovics, A. K. Petford-Long

^*Corresponding author for this work

Materials Science and Engineering

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

11 Scopus citations

Abstract

Magnetic induction maps from a sputter-deposited Co/Cr/Co trilayer have been obtained at different points of the hysteresis cycle, using a conventional transmission electron microscope. The sample shows hysteresis, with nearly parallel alignment of the magnetization in the two Co layers at remanence, but areas of antiparallel alignment developing in reverse fields. Such areas occur in similar positions at opposite points of the hysteresis loop. The strongly correlated domain patterns seen in opposite field directions suggest that the interlayer exchange coupling varies spatially. The parallel alignment observed at remanence suggests the presence of an energy barrier that needs to be overcome before antiparallel alignment can be formed. This conclusion is supported by observations of the film in a demagnetized state.

Original language	English (US)
Pages (from-to)	2447-2452
Number of pages	6
Journal	Journal of Applied Physics
Volume	82
Issue number	5
DOIs	https://doi.org/10.1063/1.366054
State	Published - Sep 1 1997

ASJC Scopus subject areas

General Physics and Astronomy

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title = "A study of interlayer exchange coupling in a Co/Cr/Co trilayer using transmission electron microscopy",

abstract = "Magnetic induction maps from a sputter-deposited Co/Cr/Co trilayer have been obtained at different points of the hysteresis cycle, using a conventional transmission electron microscope. The sample shows hysteresis, with nearly parallel alignment of the magnetization in the two Co layers at remanence, but areas of antiparallel alignment developing in reverse fields. Such areas occur in similar positions at opposite points of the hysteresis loop. The strongly correlated domain patterns seen in opposite field directions suggest that the interlayer exchange coupling varies spatially. The parallel alignment observed at remanence suggests the presence of an energy barrier that needs to be overcome before antiparallel alignment can be formed. This conclusion is supported by observations of the film in a demagnetized state.",

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T1 - A study of interlayer exchange coupling in a Co/Cr/Co trilayer using transmission electron microscopy

AU - Daykin, A. C.

AU - Jakubovics, J. P.

AU - Petford-Long, A. K.

PY - 1997/9/1

Y1 - 1997/9/1

N2 - Magnetic induction maps from a sputter-deposited Co/Cr/Co trilayer have been obtained at different points of the hysteresis cycle, using a conventional transmission electron microscope. The sample shows hysteresis, with nearly parallel alignment of the magnetization in the two Co layers at remanence, but areas of antiparallel alignment developing in reverse fields. Such areas occur in similar positions at opposite points of the hysteresis loop. The strongly correlated domain patterns seen in opposite field directions suggest that the interlayer exchange coupling varies spatially. The parallel alignment observed at remanence suggests the presence of an energy barrier that needs to be overcome before antiparallel alignment can be formed. This conclusion is supported by observations of the film in a demagnetized state.

AB - Magnetic induction maps from a sputter-deposited Co/Cr/Co trilayer have been obtained at different points of the hysteresis cycle, using a conventional transmission electron microscope. The sample shows hysteresis, with nearly parallel alignment of the magnetization in the two Co layers at remanence, but areas of antiparallel alignment developing in reverse fields. Such areas occur in similar positions at opposite points of the hysteresis loop. The strongly correlated domain patterns seen in opposite field directions suggest that the interlayer exchange coupling varies spatially. The parallel alignment observed at remanence suggests the presence of an energy barrier that needs to be overcome before antiparallel alignment can be formed. This conclusion is supported by observations of the film in a demagnetized state.

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A study of interlayer exchange coupling in a Co/Cr/Co trilayer using transmission electron microscopy

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