Tuesday, June 25, 2013

1306.5477 (Do Le Binh et al.)

Europium nitride: A novel diluted magnetic semiconductor    [PDF]

Do Le Binh, B. J. Ruck, F. Natali, H. Warring, H. J. Trodahl, E. -M. Anton, C. Meyer, L. Ranno, F. Wilhelm, A. Rogalev
Europium nitride is semiconducting and contains non-magnetic \3+, but sub-stoichiometric EuN has Eu in a mix of 2+ and 3+ charge states. We show that at \2+ ~concentrations near 15-20% EuN is ferromagnetic with a Curie temperature as high as 120 K. The \3+ ~polarization follows that of the \2+, confirming that the ferromagnetism is intrinsic to the EuN which is thus a novel diluted magnetic semiconductor. Transport measurements shed light on the likely exchange mechanisms.
View original: http://arxiv.org/abs/1306.5477

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