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Zn_{1-x}(Mn,Co)_xGeAs_2 Ferromagnetic Semiconductor: Magnetic and Transport Properties

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Kilanski L., Gorska M., Domukhovski V., Dobrowolski W., Anderson J., Rotundu C., Varniavskii S., Marenkin S.

Acta Physica Polonica A

2008

vol. 114

issue 5

1151-1157

We present the studies of magnetic and transport properties of the bulk Zn_{1-x}(Mn, Co)_xGeAs_2 mixed crystals with 0.052 ≤ x ≤0.182 grown using direct fusion method. Magnetic investigations showed that for samples with x ≥ 0.078 we observed a behavior typical of ferromagnets, with the Curie temperatures T_C ≥ 300 K. The observed ferromagnetism was probably connected with the spinodal decomposition of the Mn ions in the alloy. The transport studies including resistivity and Hall effect (at B=1.4 T) were performed. The samples showed p-type conductivity with semiconducting or metallic character, depending on the alloy composition. The Hall carrier concentration, p ≥ 10^{18} cm^{-3}, was composition dependent.

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1 Acta Physica Polonica A

1 2008

1 Anderson J.

1 Dobrowolski W.

1 Domukhovski V.

1 Gorska M.

1 Kilanski L.

1 Marenkin S.

1 Rotundu C.

1 Varniavskii S.

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Zn_{1-x}(Mn,Co)_xGeAs_2 Ferromagnetic Semiconductor: Magnetic and Transport Properties