Selected studies of magnetism at high pressure

G. R. Hearne, M. P. Pasternak, R. D. Taylor

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Most previous studies of magnetism in various compounds under extreme conditions have been conducted over a wide pressure range at room temperature or over a wide range of cryogenic temperatures at pressures below 20 GPa (200 kbar). We present some of the most recent studies of magnetism over an extended range of temperatures and pressures far beyond 20 GPa, i.e. in regions of pressure-temperature (P-T) space where magnetism has been largely unexplored. Recent techniques have permitted investigations of magnetism in selected 3d transition metal compounds in regions of P-T where physical properties may be drastically modified; related effects have often been seen in selected doping studies at ambient pressures. We present 57Fe and 129I Mössbauer isotope studies covering the range 300-4 K to sub-megabar pressures in compounds such as Sr2FeO4, LaFeO3 and FeI2, representative of a broad class of 3d transition metal compounds. At ambient pressure the electronic structure of the transition metal atom in these antiferromagnetic insulators extends from 3d4 to 3d6 and has a distinct influence on the pressure evolution of their magnetic properties. Mössbauer studies of these compounds are considered in conjunction with available structural and electrical transport data at pressure.

Original languageEnglish
Pages (from-to)145-161
Number of pages17
JournalNuovo Cimento della Societa Italiana di Fisica D - Condensed Matter, Atomic, Molecular and Chemical Physics, Biophysics
Volume18
Issue number2-3
DOIs
Publication statusPublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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