arXiv 1306.54772013-06-30cond-mat.mtrl-sci

Europium nitride: A novel diluted magnetic semiconductor

Do Le Binh, B. J. Ruck, F. Natali, H. Warring, H. J. Trodahl, E. -M. Anton, C. Meyer, L. Ranno, F. Wilhelm, A. Rogalev

备注：: 5 pages
发表信息：: Phys. Rev. Lett. 111, 167206 (2013)
DOI：: 10.1103/PhysRevLett.111.167206

英文摘要：

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.

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