Pressure derivatives of the Curie temperature of spinel-type CoCr2O4 and CoMn2O4

Article abstract of DOI:10.1016/0921-4526(93)90460-N

The magnetic permeability of CoCr₂O₄ and CoMn₂O₄ at high pressures has been measured in a piston-cylinder apparatus. The Curie temperature or the temperature of the Hopkinson peak of CoCr₂O₄ increases with pressure at a range of -0.1±0.1 to -0.3±0.2 K GPa^-1 or -0.26±0.06 to -0.17±0.09 K GPa^-1, respectively; namely, these are negative pressure derivatives and those of CoCr₂O₄ increase with pressure at a rate of 1.5±0.2 to 2.7±0.2 K GPa^-1 or 1.37±0.08 to 1.9±0.4 K GPa^-1, respectively.