Influence of in-plane crystalline quality of an antiferromagnet on perpendicular exchange coupling and exchange bias

M. R. Fitzsimmons, Chris Leighton, C. F. Majkrzak, J. A. Dura, J. R. Groves, R. W. Springer, P. N. Arendt, V. Leiner, H. Lauter, Ivan K. Schuller, A. Hoffmann, Kai Liu

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Abstract

We have undertaken a systematic study of the influence of in-plane crystalline quality of the antiferromagnet on exchange bias. Polarized neutron reflectometry and magnetometry were used to determine the anisotropies of polycrystalline ferromagnetic (F) Fe thin films exchange coupled to antiferromagnetic (AF) untwinned single crystal (110) FeF2, twinned single crystal (110) FeF2 thin films and (110) textured polycrystalline FeF2 thin films. A correlation between the anisotropies of the AF and F thin films with exchange bias was identified. Specifically, when exchange coupling across the F-AF interface introduces an additional anisotropy axis in the F thin film - one perpendicular to the cooling field, the magnetization reversal mechanism is affected (as observed with neutron scattering) and exchange bias is significantly enhanced.

Original languageEnglish (US)
Article number134436
Pages (from-to)134436-134436
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number13
DOIs
StatePublished - Mar 2002

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    Fitzsimmons, M. R., Leighton, C., Majkrzak, C. F., Dura, J. A., Groves, J. R., Springer, R. W., Arendt, P. N., Leiner, V., Lauter, H., Schuller, I. K., Hoffmann, A., & Liu, K. (2002). Influence of in-plane crystalline quality of an antiferromagnet on perpendicular exchange coupling and exchange bias. Physical Review B - Condensed Matter and Materials Physics, 65(13), 134436-134436. [134436]. https://doi.org/10.1103/PhysRevB.65.134436