We have used X-ray magnetic circular dichroism and magnetometry to study isolated Fe@Cr core-shell nanoparticles with an Fe core diameter of 2.7 nm (850 atoms) and a Cr shell thickness varying between 1 and 2 monolayers. The addition of Cr shells significantly reduces the spin moment but does not change the orbital moment. At least two Cr atomic layers are required to stabilize a ferromagnetic/antiferromagnetic interface and generate the associated exchange bias and increase in coercivity. RI Kroeger, Roland/D-5321-2012; Lari, Leonardo/D-6844-2012; Peddis, Davide/J-8556-2013
Exchange Bias in Fe@Cr Core-Shell Nanoparticles
PEDDIS, DAVIDE;
2013-01-01
Abstract
We have used X-ray magnetic circular dichroism and magnetometry to study isolated Fe@Cr core-shell nanoparticles with an Fe core diameter of 2.7 nm (850 atoms) and a Cr shell thickness varying between 1 and 2 monolayers. The addition of Cr shells significantly reduces the spin moment but does not change the orbital moment. At least two Cr atomic layers are required to stabilize a ferromagnetic/antiferromagnetic interface and generate the associated exchange bias and increase in coercivity. RI Kroeger, Roland/D-5321-2012; Lari, Leonardo/D-6844-2012; Peddis, Davide/J-8556-2013
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