Hydrostatic pressure study of paramagnetic-ferromagnetic phase transition in (Ga,Mn)As

Abstract

The effect of hydrostatic pressure on the paramagnetic - ferromagnetic phase transition has been studied in (Ga,Mn)As. The variation of the Curie temperature (TC) with pressure was monitored by two transport methods: (1) - measurement of zero field resistivity versus temperature ρ(T), (2) - dependence on temperature of the Hall voltage hysteresis loop. Two specimens of different resistivity characteristics were examined. The measured pressure-induced changes of TC were relatively small (of the order of 1K/GPa) for both samples, however they were opposite for the two.

8 pages, 7 figures

References in corpus (3)

• Theory of ferromagnetic (III,Mn)V semiconductors
• Curie point singularity in the temperature derivative of resistivity in (Ga,Mn)As
• Hole states in wide band-gap diluted magnetic semiconductors and oxides

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