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Ferromagnetic excess moments and apparent exchange bias in FeF2 single crystals.

ABSTRACT: The anisotropic antiferromagnet FeF2 has been extensively used as an antiferromagnetic layer to induce exchange bias effects in ferromagnetic/antiferromagnetic bilayers and heterostructures. In this work, an apparent exchange bias occurring in the low temperature hysteresis loops of FeF2 single crystals is investigated. A detailed investigation of the hysteresis and remnant magnetization indicates that the observation of an apparent exchange bias in FeF2 stems from an intrinsic excess moment associated with a distortion of the antiferromagnetic structure of piezomagnetic origin.

SUBMITTER: Joshi DC 

PROVIDER: S-EPMC6906504 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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Ferromagnetic excess moments and apparent exchange bias in FeF<sub>2</sub> single crystals.

Joshi D C DC   Nordblad P P   Mathieu R R  

Scientific reports 20191211 1

The anisotropic antiferromagnet FeF<sub>2</sub> has been extensively used as an antiferromagnetic layer to induce exchange bias effects in ferromagnetic/antiferromagnetic bilayers and heterostructures. In this work, an apparent exchange bias occurring in the low temperature hysteresis loops of FeF<sub>2</sub> single crystals is investigated. A detailed investigation of the hysteresis and remnant magnetization indicates that the observation of an apparent exchange bias in FeF<sub>2</sub> stems fr  ...[more]