Relationship between granularity of antiferromagnet and exchange bias

Details Relationship between granularity of antiferromagnet and exchange bias Relationship between granularity of antiferromagnet and exchange bias

2008-07-08

arxiv.org/abs/0807.1159v1

Physics

Condensed Matter

Materials Science

Scientific paper

We studied exchange bias in magnetic multilayers incorporating antiferromagent CoO doped with up to 35 atomic percent of Pt. The exchange bias increased with doping in epitaxial films, but did not significantly change in polycrystalline films at the lowest measured temperature of 5 K, and decreased at higher temperatures. We explain our results by the increased granularity of the doped antiferromagnetic films, resulting in simultaneous enhancement of the uncompensated spin density and reduction of the magnetic stability of antiferromagnetic grains.

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