Nonlinear pressure dependence of TN in almost multiferroic EuTiO3

J Phys Condens Matter. 2013 Sep 18;25(37):376002. doi: 10.1088/0953-8984/25/37/376002. Epub 2013 Aug 21.

Abstract

The antiferromagnetic (AFM) phase transition temperature TN of EuTiO3 has been studied as a function of pressure p. The data reveal a nonlinear dependence of TN on p with TN increasing with increasing pressure. The exchange interactions exhibit an analogous dependence on p as TN (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 ΘW remains anomalous since it always exhibits positive values. The data are analyzed within the Bloch power law model and provide excellent agreement with experiment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Europium / chemistry*
  • Ferrous Compounds / chemistry*
  • Magnetics*
  • Oxides / chemistry*
  • Phase Transition
  • Pressure
  • Titanium / chemistry*
  • Transition Temperature

Substances

  • Ferrous Compounds
  • Oxides
  • europium titanium trioxide
  • Europium
  • Titanium