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.
authors.affiliation: Department of Chemical Engineering and Materials Science, University of California, Davis, Davis, California 95616, USA.
authors.forename: Yayoi
authors.initials: Y
authors.lastname: Takamura
authors.affiliation: Department of Electronics and Telecommunications, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
authors.forename: Erik
authors.initials: E
authors.lastname: Folven
authors.affiliation: Department of Chemical Engineering and Materials Science, University of California, Davis, Davis, California 95616, USA.
authors.forename: Jonathan B R
authors.initials: JB
authors.lastname: Shu
authors.affiliation: Department of Chemical Engineering and Materials Science, University of California, Davis, Davis, California 95616, USA.
authors.forename: Karl R
authors.initials: KR
authors.lastname: Lukes
authors.affiliation: Department of Chemical Engineering and Materials Science, University of California, Davis, Davis, California 95616, USA.
authors.forename: Binzhi
authors.initials: B
authors.lastname: Li
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Andreas
authors.initials: A
authors.lastname: Scholl
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Anthony T
authors.initials: AT
authors.lastname: Young
authors.affiliation: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors.forename: Scott T
authors.initials: ST
authors.lastname: Retterer
authors.affiliation: Department of Electronics and Telecommunications, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
authors.forename: Thomas
authors.initials: T
authors.lastname: Tybell
authors.affiliation: Department of Electronics and Telecommunications, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
authors.forename: Jostein K
authors.initials: JK
authors.lastname: Grepstad