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

doi:10.1063/1.3697834

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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Abstract

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 language	English
Article number	132405
Number of pages	3
Journal	Applied Physics Letters
Volume	100
Issue number	13
DOIs	https://doi.org/10.1063/1.3697834
Publication status	Published - 26 Mar 2012

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

abstract = "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]",

author = "M. Demper and W. Heimbrodt and C. Bradford and Prior, {K. A.} and J. Kehrle and {von Nidda}, {H. -A. Krug} and A. Loidl",

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doi = "10.1063/1.3697834",

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T1 - Ferromagnetic phase transition in zinc blende (Mn,Cr)S-layers grown by molecular beam epitaxy

AU - Demper, M.

AU - Heimbrodt, W.

AU - Bradford, C.

AU - Prior, K. A.

AU - Kehrle, J.

AU - von Nidda, H. -A. Krug

AU - Loidl, A.

PY - 2012/3/26

Y1 - 2012/3/26

N2 - 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]

AB - 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]

U2 - 10.1063/1.3697834

DO - 10.1063/1.3697834

M3 - Article

SN - 0003-6951

VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 13

M1 - 132405

ER -

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

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