Anomalous transport and ferromagnetism in the diluted magnetic semiconductor Sb2−xCrxTe3

We grew single crystals of the new dilute magnetic semiconductor p-Sb2−xCrxTe3 (x=0,0.0115,0.0215) and investigated their transport, magneto-transport and magnetic properties in the temperature interval 1.7–300K. In high fields we clearly observed Shubnikov–de Haas oscillations, that show a decrease...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2005-11, Vol.368 (1-4), p.32-41
Main Authors: Kulbachinskii, V.A., Tarasov, P.M., Brück, E.
Format: Article
Language:English
Subjects:
Dilute magnetic semiconductors
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Summary:We grew single crystals of the new dilute magnetic semiconductor p-Sb2−xCrxTe3 (x=0,0.0115,0.0215) and investigated their transport, magneto-transport and magnetic properties in the temperature interval 1.7–300K. In high fields we clearly observed Shubnikov–de Haas oscillations, that show a decrease in hole concentration for Cr-doped samples. A negative magnetoresistance and anomalous Hall effect are observed in Cr-doped samples. Ferromagnetic order is found below the Curie temperature Tc≈5.8K (x=0.0215) and Tc≈2.0K (x=0.0115). In the ferromagnetic phase we observe large magnetic anisotropy with the easy-axis parallel to the C3 crystallographic axis.
ISSN:0921-4526
DOI:10.1016/j.physb.2005.06.033