Research on phase transformations in 3d-metal oxides at high and ultrahigh pressure: state of the art
I.S. Lyubutin a
A.G. Gavriliuk b
a Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii prosp. 59, Moscow, 119333, Russian Federaion
b Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow, Russian Federation
In magnetic systems with strong electron correlations, the theory predicts the existence of a pressure-induced insulator — metal phase transition accompanied by a collapse of the localized magnetic moment and by a structural phase transition. However, the values of the pressures at which these effects should be observed are quite high and hardly achievable experimentally. This paper reviews the latest results of experimental studies concerning the influence of high and ultrahigh pressures on magnetic and crystal structures, electron and spin states, and
the transport properties of some oxides of 3d metals with various crystal structures.