Ferromagnetic phase transition in zinc blende (Mn,Cr)S-layers grown by molecular beam epitaxy

M. Demper, W. Heimbrodt, C. Bradford, K. A. Prior, J. Kehrle, H. -A. Krug von Nidda, A. Loidl

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We studied the magnetization of zinc blende Mn1-xCrxS films embedded between diamagnetic ZnSe layers grown by molecular beam epitaxy with chromium mole fractions x <= 0.7. These ternary semiconductors exhibit an increasing ferromagnetic contribution with increasing x caused by competing antiferromagnetic and ferromagnetic coupling. As a result, whereas MnS in the zinc blende phase is a pure antiferromagnet, it was found that with increasing x zinc blende Mn1-xCrxS became a ferromagnet. The ferromagnetic phase transition dominates in case of x greater than about 0.5. Hence, we conclude that metastable zinc blende CrS will be a ferromagnetic material with half-metallic character in contrast to the analogous stable NiAs-structure which exhibits an antiferromagnetic phase transition. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3697834]

Original languageEnglish
Article number132405
Number of pages3
JournalApplied Physics Letters
Issue number13
Publication statusPublished - 26 Mar 2012


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