Borderline magnetism in Sr4 Ru3 O10: Impact of la and Ca doping on itinerant ferromagnetism and metamagnetism

S. Chikara, V. Durairaj, W. H. Song, Y. P. Sun, X. N. Lin, A. Douglass, G. Cao, P. Schlottmann, S. Parkin

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

An investigation of La and Ca doped Sr4 Ru3 O10, featuring a coexistence of interlayer ferromagnetism and intralayer metamagnetism, is presented. La doping readily changes magnetism between ferromagnetism and metamagnetism by tuning the density of states. It also results in different Curie temperatures for the c -axis and the basal plane, highlighting a rare spin-orbit coupling with the crystal field states. In contrast, Ca doping enhances the c -axis ferromagnetism and the magnetic anisotropy. La doping also induces a dimensional crossover in the interlayer transport whereas Ca doping exhibits a tunneling magnetoresistance and an extraordinary T3 2 dependence of the resistivity. The drastic changes caused by the doping demonstrate a rare borderline magnetism that is delicately linked to the interplay of the density of states and spin-orbit coupling.

Original languageEnglish
Article number224420
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number22
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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