Spin-flop coupling and exchange bias in embedded complex oxide micromagnets

Yayoi Takamura; Erik Folven; Jonathan B.R. Shu; Karl R. Lukes; Binzhi Li; Andreas Scholl; Anthony T. Young; Scott T. Retterer; Thomas Tybell; Jostein K. Grepstad

doi:10.1103/PhysRevLett.111.107201

Spin-flop coupling and exchange bias in embedded complex oxide micromagnets

Yayoi Takamura, Erik Folven, Jonathan B.R. Shu, Karl R. Lukes, Binzhi Li, Andreas Scholl, Anthony T. Young, Scott T. Retterer, Thomas Tybell, Jostein K. Grepstad

Center for Nanophase Matls Sciences

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

26 Scopus citations

Abstract

The magnetic domains of embedded micromagnets with 2 μm×2 μm dimensions defined in epitaxial La_0.7Sr_0.3MnO₃ (LSMO) thin films and LaFeO₃/LSMO bilayers were investigated using soft x-ray magnetic microscopy. Square micromagnets aligned with their edges parallel to the easy axes of LSMO provide an ideal experimental geometry for probing the influence of interface exchange coupling on the magnetic domain patterns. The observation of unique domain patterns not reported for ferromagnetic metal microstructures, namely divergent antiferromagnetic vortex domains and "Z"-type domains, suggests the simultaneous presence of spin-flop coupling and local exchange bias in this system.

Original language	English
Article number	107201
Journal	Physical Review Letters
Volume	111
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.111.107201
State	Published - Sep 3 2013

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title = "Spin-flop coupling and exchange bias in embedded complex oxide micromagnets",

abstract = "The magnetic domains of embedded micromagnets with 2 μm×2 μm dimensions defined in epitaxial La0.7Sr0.3MnO3 (LSMO) thin films and LaFeO3/LSMO bilayers were investigated using soft x-ray magnetic microscopy. Square micromagnets aligned with their edges parallel to the easy axes of LSMO provide an ideal experimental geometry for probing the influence of interface exchange coupling on the magnetic domain patterns. The observation of unique domain patterns not reported for ferromagnetic metal microstructures, namely divergent antiferromagnetic vortex domains and {"}Z{"}-type domains, suggests the simultaneous presence of spin-flop coupling and local exchange bias in this system.",

author = "Yayoi Takamura and Erik Folven and Shu, {Jonathan B.R.} and Lukes, {Karl R.} and Binzhi Li and Andreas Scholl and Young, {Anthony T.} and Retterer, {Scott T.} and Thomas Tybell and Grepstad, {Jostein K.}",

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doi = "10.1103/PhysRevLett.111.107201",

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T1 - Spin-flop coupling and exchange bias in embedded complex oxide micromagnets

AU - Takamura, Yayoi

AU - Folven, Erik

AU - Shu, Jonathan B.R.

AU - Lukes, Karl R.

AU - Li, Binzhi

AU - Scholl, Andreas

AU - Young, Anthony T.

AU - Retterer, Scott T.

AU - Tybell, Thomas

AU - Grepstad, Jostein K.

PY - 2013/9/3

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N2 - The magnetic domains of embedded micromagnets with 2 μm×2 μm dimensions defined in epitaxial La0.7Sr0.3MnO3 (LSMO) thin films and LaFeO3/LSMO bilayers were investigated using soft x-ray magnetic microscopy. Square micromagnets aligned with their edges parallel to the easy axes of LSMO provide an ideal experimental geometry for probing the influence of interface exchange coupling on the magnetic domain patterns. The observation of unique domain patterns not reported for ferromagnetic metal microstructures, namely divergent antiferromagnetic vortex domains and "Z"-type domains, suggests the simultaneous presence of spin-flop coupling and local exchange bias in this system.

AB - The magnetic domains of embedded micromagnets with 2 μm×2 μm dimensions defined in epitaxial La0.7Sr0.3MnO3 (LSMO) thin films and LaFeO3/LSMO bilayers were investigated using soft x-ray magnetic microscopy. Square micromagnets aligned with their edges parallel to the easy axes of LSMO provide an ideal experimental geometry for probing the influence of interface exchange coupling on the magnetic domain patterns. The observation of unique domain patterns not reported for ferromagnetic metal microstructures, namely divergent antiferromagnetic vortex domains and "Z"-type domains, suggests the simultaneous presence of spin-flop coupling and local exchange bias in this system.

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JO - Physical Review Letters

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Spin-flop coupling and exchange bias in embedded complex oxide micromagnets

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