An interface-proximity model for switchable interfacial uncompensated antiferromagnetic spins and their role in exchange bias
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- An interface-proximity model for switchable interfacial uncompensated antiferromagnetic spins and their role in exchange bias
- Lee, Ki-Suk; Yu, YS; Kim, SK
- MAGNETIC-ANISOTROPY; FILMS; BILAYERS
- Issue Date
- AMER INST PHYSICS
- APPLIED PHYSICS LETTERS, v.86, no.19, pp.1 - 3
- 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.
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