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Abstract:
The antiferromagnetic (AFM) phase transition temperature T-N of EuTiO3 has been studied as a function of pressure p. The data reveal a nonlinear dependence of T-N on p with T-N increasing with increasing pressure. The exchange interactions exhibit an analogous dependence on p as T-N (if the absolute value of the nearest neighbor interaction is considered) and there is evidence that the AFM transition is robust with increasing pressure. The corresponding Weiss temperature Theta(W) remains anomalous since it always exhibits positive values. The data are analyzed within the Bloch power law model and provide excellent agreement with experiment.
