High temperature ferromagnetism with a giant magnetic moment in transparent co-doped SnO(2-delta).

By S. Ogale, R. Choudhary, J. Buban, S. Lofland, S. Shinde, S. Kale, V. N. Kulkarni, J. Higgins, C. Lanci, J. Simpson and 4 more. Physical Review Letters, 2003

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The occurrence of room temperature ferromagnetism is demonstrated in pulsed laser deposited thin films of Sn(1-x)Co(x)O(2-delta) (x<0.3). Interestingly, films of Sn(0.95)Co(0.05)O(2-delta) grown on R-plane sapphire not only exhibit ferromagnetism with a Curie temperature close to 650 K, but also a giant magnetic moment of 7.5+/-0.5 micro(B)/Co, not yet reported in any diluted magnetic semiconductor system. The films are semiconducting and optically highly transparent.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

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