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Exchange Bias in Fe@Cr Core-Shell Nanoparticles

DOI: 10.1021/nl401587t DOI Help

Authors: Chris Binns (Department of Physics and Astronomy, University of Leicester) , Muhammad Qureshi (Department of Physics, Hazara University) , Davide Peddis (Institute for Structure of Matter, CNR) , Steve Baker (University of Leicester) , Paul Howes (University of Leicester) , Adrian Boatwright (University of Leicester) , Stuart Cavill (University of York, Diamond Light Source) , Sarnjeet Dhesi (Diamond Light Source) , Leonardo Lari (York JEOL Nanocentre, University of York) , Roland Kröger (Department of Physics, University of York) , Sean Langridge (ISIS, STFC Rutherford Appleton Laboratory)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nano Letters , VOL 13 (7) , PAGES 3334 - 3339

State: Published (Approved)
Published: June 2013

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.

Journal Keywords: Core-Shell Nanoparticle, Exchange Bias, Ferromagnetic; Antiferromagnetic Interface, Spin

Subject Areas: Physics, Engineering


Instruments: I06-Nanoscience