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Ferromagnetism in Co doped CeO2: Observation of a giant magnetic moment with a high Curie temperature

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7 Author(s)
Tiwari, Ashutosh ; NanoStructured Materials Research Laboratory (NMRL), Department of Materials Science & Engineering, University of Utah, Salt Lake City, Utah 84112 ; Bhosle, V.M. ; Ramachandran, S. ; Sudhakar, N.
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We report room temperature ferromagnetism in single crystal Ce1-xCoxO2-δ (x≤0.05) films deposited on a LaAlO3(001) substrate. Films were grown by a pulsed laser deposition technique and were thoroughly characterized using x-ray diffraction, high-resolution transmission electron microscopy coupled with electron energy loss spectroscopy and scanning transmission electron microscopy-Z contrast, x-ray photoelectron spectroscopy, optical transmission spectroscopy, and magnetic measurements. These films are transparent in the visible regime and exhibit a very high Curie temperature ∼740–875 K with a giant magnetic moment. Our results indicate that the ferromagnetic property is intrinsic to the CeO2 system and is not a result of any secondary magnetic phase or cluster formation.

Published in:

Applied Physics Letters  (Volume:88 ,  Issue: 14 )

Date of Publication:

Apr 2006

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