Local disorder effects on the pressure dependence of the metal–insulator transition in manganese perovskites

18 May 1998

journal article
Published by AIP Publishing in Applied Physics Letters

Vol. 72 (20) , 2607-2609
https://doi.org/10.1063/1.121432

Abstract

We address the role of the local disorder created by substitutional ions in L2/3A1/3MnO3 oxides, on the pressure dependence of the Curie temperature dln TC/dP. A number of manganites having distinct averaged lanthanide R0 radii and size variance σ2 have been prepared and their resistivity measured up to 11 kbar. It is found that the measured dln TC/dP is mainly determined by R0. However, materials having larger local disorder display larger pressure sensitivity. It is proposed that this results from partial suppression of the local disorder under pressure, and a model is developed to account for the experimental data.

Keywords

This publication has 14 references indexed in Scilit:

Pressure effects on the metal-insulator transition in magnetoresistive manganese perovskites
Physical Review B, 1997
Magnetic frustration in mixed valence manganites
Physical Review B, 1997
Cation disorder and size effects in magnetoresistive manganese oxide perovskites
Physical Review B, 1996
Spontaneous behavior and magnetic field and pressure effects on ${La}_{2 / 3}$ ${Ca}_{1 / 3}$ ${MnO}_{3}$ perovskite
Physical Review B, 1996
Pressure effects on the magnetoresistance in doped manganese perovskites
Physical Review B, 1995
High-pressure neutron-diffraction study of the metallization process in PrNi $O_{3}$
Physical Review B, 1995
Substantial pressure effects on the electrical resistivity and ferromagnetic transition temperature of ${La}_{1 - x}$ ${Ca}_{x}$ ${MnO}_{3}$
Physical Review B, 1995
Extraordinary pressure dependence of the metal-to-insulator transition in the charge-transfer compounds NdNiO $_{3}$ and PrNiO $_{3}$
Physical Review B, 1993
Pressure dependence of the metal-insulator transition in the charge-transfer oxides R ${NiO}_{3}$ (R=Pr,Nd, ${Nd}_{0.7}$ ${La}_{0.3}$ )
Physical Review B, 1993
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
Acta Crystallographica Section A, 1976