Dimer breaking and high-temperature ferromagnetism in LaCo2 (Ge1-x Px) 2

Shuang Jia, R. J. Cava

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

We report the destabilization of the lattice collapsed phase of LaCo 2 Ge2 due to X-X (X=Ge1-x Px) dimer breaking in the LaCo2 (Ge1-x Px) 2 solid solution. The magnetic properties of the system are strongly affected. P substitution for Ge can first be understood as a simple band-filling effect that drives the system from a Pauli paramagnet to a ferromagnet for 0≤x≤0.7. The ferromagnetic Curie temperature (TC) reaches 230 K for x=0.7. For 0.7≤x≤1, however, the extra electron donated by the P substitution is consumed in breaking the X-X dimers present, decreasing the layer-to-layer magnetic coupling and correspondingly suppressing TC.

Original languageEnglish (US)
Article number180410
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number18
DOIs
StatePublished - Nov 18 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Dimer breaking and high-temperature ferromagnetism in LaCo<sub>2</sub> (Ge<sub>1-x</sub> P<sub>x</sub>) <sub>2</sub>'. Together they form a unique fingerprint.

  • Cite this