High temperature magnetic order in zinc sulfide doped with copper

Owens, Frank J.; Gladczuk, L.; Szymczak, R.; Dluzewski, P.; Wisniewski, A.; Szymczak, H.; Golnik, A.; Bernhard, Christian; Niedermayer, Ch.

doi:10.1016/j.jpcs.2011.02.009

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Journal article

High temperature magnetic order in zinc sulfide doped with copper

Owens, Frank J. Army Armament Research, Development and Engineering Center, Picatinny, USA - Department of Physics, Hunter College, City University of New York, USA
Gladczuk, L. Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
Szymczak, R. Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
Dluzewski, P. Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
Wisniewski, A. Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
Szymczak, H. Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
Golnik, A. Institute of Experimental Physics, University of Warsaw, Poland
Bernhard, Christian Department of Physics and FriMat Center for Nanomaterials, University of Fribourg, Switzerland
Niedermayer, Ch. Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institute, Villigen, Switzerland

19.02.2011

Published in:

Journal of Physics and Chemistry of Solids. - 2011, vol. 72, no. 6, p. 648-652

English We report the first observation of magnetic order above room temperature in zinc sulfide doped with Cu²⁺ made by a simple sintering process and detected by ferromagnetic resonance (FMR), SQUID magnetometry and the μSR experiments. FMR study shows nonzero absorption above room temperature indicating a high value of Curie temperature. Field-cooled and zero-field-cooled magnetization data indicate a bifurcation at about 300 K. This temperature is considered to be the blocking temperature at ferromagnetic nanosized regions, which appear to exist in the sample of ZnS doped with copper. The muon spin rotation measurements confirm highly nonuniform magnetic order. It was shown that about 25% of the sample volume fraction exhibits strong magnetism.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

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