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Magnetic interaction reversal in watermelon nanostructured Cr-doped Fe nanoclusters
Kaur, Maninder Dai, Qilin Bowden, Mark Engelhard, Mark Wu, Yaqiao Tang, Jinke Qiang, You
Kaur, Maninder
Dai, Qilin
Bowden, Mark
Engelhard, Mark
Wu, Yaqiao
Tang, Jinke
Qiang, You
Abstract
Description
Cr-doped core-shell Fe/Fe-oxide nanoclusters (NCs) were synthesized at varied atomic percentages of Cr from 0 at.% to 8 at.%. The low concentrations of Cr (<10 at.%) were selected in order to inhibit the complete conversion of the Fe-oxide shell to Cr2O3 and the Fe core to FeCr alloy. The magnetic interaction in Fe/Fe-oxide NCs (~25 nm) can be controlled by antiferromagnetic Cr-dopant. We report the origin of σFeCr phase at very low Cr concentration (2 at.%) unlike in previous studies, and the interaction reversal from dipolar to exchange interaction in watermelon-like Cr-doped core-shell NCs.
Date
2013-11-13
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Publisher
University of Wyoming. Libraries
Research Projects
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Keywords
Physical Sciences and Mathematics