Hydrostatic pressure study of paramagnetic-ferromagnetic phase   transition in (Ga,Mn)As
  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 {\rho}(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. 
M. Gryglas-Borysiewicz, A. Kwiatkowski, M. Baj, D. Wasik, J. Przybytek   and J. Sadowski
cond-mat.mtrl-sci