Hydrostatic pressure effects on the magnetic susceptibility of ruthenium oxide Sr3Ru2O7: Evidence for pressure-enhanced antiferromagnetic instability

Yuri V. Sushko, Bruno DeHarak, Gang Cao, G. Shaw, D. K. Powell, J. W. Brill

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Hydrostatic pressure effects on the temperature- and magnetic field dependencies of the in-plane and out-of-plane magnetization of the bi-layered perovskite Sr3Ru2O7 have been studied by SQUID magnetometer measurements under a hydrostatic helium-gas pressure. The anomalously enhanced low-temperature value of the paramagnetic susceptibility has been found to systematically decrease with increasing pressure. The effect is accompanied by an increase of the temperature Tmax of a pronounced peak of susceptibility. Thus, magnetization measurements under hydrostatic pressure reveal that the lattice contraction in the structure of Sr3Ru2O7 promotes antiferromagnetism and not ferromagnetism. The effects can be explained by the enhancement of the inter-bi-layer antiferromagnetic spin coupling, driven by the shortening of the superexchange path, and suppression, due to the band-broadening effect, of competing itinerant ferromagnetic correlations.

Original languageEnglish
Pages (from-to)341-346
Number of pages6
JournalSolid State Communications
Volume130
Issue number5
DOIs
StatePublished - May 2004

Bibliographical note

Funding Information:
This research was supported in part by the National Science Foundation, grants #DMR-9731257 and DMR-0100572

Keywords

  • A. Ruthenates
  • D. Antiferromagnetism
  • D. Ferromagnetism
  • D. SQUID magnetometry
  • E. High pressure

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry

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