High Curie temperatures in ferromagnetic Cr-doped AlN thin films

Details High Curie temperatures in ferromagnetic Cr-doped AlN thin films High Curie temperatures in ferromagnetic Cr-doped AlN thin films

2004-04-19

arxiv.org/abs/cond-mat/0404436v1

Physics

Condensed Matter

Materials Science

Submitted to APL

Scientific paper

10.1063/1.1763216

Al1-xCrxN thin films with 0.02?x?0.1 were deposited by reactive co-sputtering onto c-plane (001) sapphire. Room-temperature ferromagnetism with a coercive field of 85 Oe was observed in samples with chromium contents as low as x = 0.027 (2.7%). With increasing Cr content the mean magnetic moment is strongly suppressed, with a maximum saturation moment of 0.62 and 0.71 ?B per Cr atom at 300 and 50 K respectively. We show that the Curie temperature of Al1-xCrxN for x = 0.027 is greater than 900 K.

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