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Studies of Diluted Magnetic Semiconductor Sn_{1-x-y-z}Ge_{x}Mn_{y}Gd_{z}Te

100%

Sichkovskyi V., Radchenko M., Lashkarev G., Slyn'ko V., Slyn'ko E., Knoff W., Domukhovski V., Dziawa P., Story T.

Acta Physica Polonica A

2009

vol. 116

issue 5

911-912

Magnetization, anomalous Hall effect, thermoelectric power, magnetoresistance, and resistivity of Sn_{1-x-y-z}Ge_{x}Mn_{y}Gd_{z}Te (x = 0.039÷0.597, y = 0.077÷0.125, z = 0.0014÷0.028) mixed crystals were studied over the temperature range 4.2-300 K. The ferromagnetic order with Curie temperature 18-24 K was revealed.

Ferromagnetism of Narrow-Gap Ge_{1-x-y}Sn_xMn_yTe and Layered In_{1-x}Mn_xSe Semiconductors

81%

Lashkarev G., Sichkovskyi V., Radchenko M., Dmitriev A., Slyn'ko V., Slyn'ko E., Kovalyuk Z., Butorin P., Knoff W., Story T., Szymczak R., Jakieła R., Aleshkevych P., Dobrowolski W.

Acta Physica Polonica A

2008

vol. 114

issue 5

1219-1227

Magnetic susceptibility, Hall effect and resistivity of narrow-gap Ge_{1-x-y}Sn_xMn_yTe single crystals (x = 0.083÷0.115; y = 0.025÷0.124) were investigated in the temperature range 4.2-300 K revealing a ferromagnetic ordering at T_C ≈ 50 K. Temperature dependence of magnetization indicates a superparamagnetic phase with magnetic clusters arranging in a spin glass state below the freezing temperature T_f. Magnetic structure of InSe ⟨Mn⟩ 2D-ferromagnetic single crystals was studied by SQUID magnetometry, neutron diffraction, secondary ion mass spectroscopy, and wave dispersive spectra. Hysteresis loops of magnetization were observed at least up to 350 K. The cluster model of ferromagnetism is considered. The formation of self-assembled superlattice ferromagnetic InSe:Mn/antiferromagnetic MnSe during growth process and further annealing was established.

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2 Acta Physica Polonica A

1 2009

1 2008

2 Knoff W.

2 Lashkarev G.

2 Radchenko M.

2 Sichkovskyi V.

2 Slyn'ko E.

2 Slyn'ko V.

2 Story T.

1 Aleshkevych P.

1 Butorin P.

1 Dmitriev A.

1 Dobrowolski W.

1 Domukhovski V.

1 Dziawa P.

1 Jakieła R.

1 Kovalyuk Z.

1 Szymczak R.

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Studies of Diluted Magnetic Semiconductor Sn_{1-x-y-z}Ge_{x}Mn_{y}Gd_{z}Te

Ferromagnetism of Narrow-Gap Ge_{1-x-y}Sn_xMn_yTe and Layered In_{1-x}Mn_xSe Semiconductors