Modulation of the ferromagnetic insulating phase in Pr0.8Ca0.2MnO3 by Co substitution

T. Harada, I. Ohkubo, M. Lippmaa, Y. Matsumoto, M. Sumiya, H. Koinuma, M. Oshima

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Ferromagnetic insulator Pr0.8Ca0.2Mn1-yCoy O3 (0 ≤ y ≤ 0.7) thin films were epitaxially grown by pulsed laser deposition on substrates of (LaAlO3)0.3(SrAl0.5Ta0.5O3)0.7 (100). To probe the ferromagnetic insulator state, the Co content dependences of the structural, magnetic, and transport properties were studied. Variation of lattice constant by the Co substitution is well reproduced considering that divalent and trivalent Co ions substitute for Mn ions at the perovskite B-sites. For 0 ≤ y ≤ 0.3, the Curie temperature, saturation magnetization, and magnetoresistance increase with increasing Co content, retaining the insulating properties. Detailed analyses of transport and magnetic properties indicate the contribution of both double exchange and superexchange interactions to the appearance of the ferromagnetic insulating phase. (

Original languageEnglish
Pages (from-to)34-36
Number of pages3
JournalPhysica Status Solidi - Rapid Research Letters
Volume5
Issue number1
DOIs
Publication statusPublished - 2011 Jan
Externally publishedYes

Keywords

  • Epitaxy
  • Magnetism
  • Oxides
  • Pulsed laser deposition
  • Thin films

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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