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Anhøj, Thomas Aarøe
Technical University of Denmark
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article
Magnetic properties of Fe1-xMnx/Fe nanocomposites
Abstract
We have prepared nanocomposites of mixtures of ferromagnetic alpha-Fe and antiferromagnetic gamma-Fe50Mn50 nanoparticles, and studied their magnetic and structural properties by magnetization measurements, Mössbauer spectroscopy, and x-ray diffraction. A sample consisting of a 1:1 mixture of the two materials showed enhanced coercivity, but almost negligible exchange bias at room temperature after field cooling from 520 K. However, samples with higher content of gamma-Fe50Mn50 showed significant exchange bias. The mechanisms for exchange bias and enhanced coercivity in the system are discussed. ©2004 American Institute of Physics.