An interface-proximity model for switchable interfacial uncompensated antiferromagnetic spins and their role in exchange bias | Zendy

KiSuk Lee | Zendy; YoungSang Yu | Zendy; SangKoog Kim | Zendy

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An interface-proximity model for switchable interfacial uncompensated antiferromagnetic spins and their role in exchange bias

Author(s) -

KiSuk Lee,

YoungSang Yu,

SangKoog Kim

Publication year - 2005

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1920412

Subject(s) - exchange bias , antiferromagnetism , spins , condensed matter physics , ferromagnetism , coercivity , materials science , layer (electronics) , exchange interaction , field (mathematics) , biasing , magnetic field , physics , nanotechnology , magnetic anisotropy , magnetization , voltage , mathematics , quantum mechanics , pure mathematics

We propose an interface-proximity model that allows us to solve a longstanding puzzle regarding large discrepancies between the experimentally observed and theoretically estimated values of exchange-bias field Heb in coupled ferromagneticantiferromagnetic (FAF) metallic films. In this proposed model, switchable uncompensated (UC) AF spins in contact with an F layer are taken into account as an additionally inserting layer that is chemically or magnetically distinguishable from each of the nominal AF and F layers. Reductions in Heb, enhancements in coercivity, and other exchange-bias behaviors typically observed in experiments are very well reproduced from this model. The switchable interfacial UC region with a sizable thickness, heretofore ignored, plays a crucial role in the exchange bias phenomenon.open6

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