High-temperature ferromagnetism and tunable semiconductivity of (Ba, Sr)M2±xRu4±xO11 (M = Fe, Co): A new paradigm for spintronics

Larysa Shlyk, Sergiy Kryukov, Barbara Schüpp-Niewa, Rainer Niewa, Lance E. De Long

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The high-temperature ferromagnetism and tunable semiconductivity of ternary ruthenium ferrites that offer a new paradigm for spintronics was investigated. Single crystals and polycrystals of strontium ferrites were prepared, whose physical properties were compared to those of the barium ferrites. Polycrystals of SrFe3Ru3O11 were synthesized by heating of a mixture of stoichiometric amounts of SrCO3, RuO2, and FeO3 to 1190°C for 15 hours. Rietveld refinement of the X-ray powder diffraction data was consistent with the composition SrFe 3.0Ru3.0O11. It was observed that (Ba,Sr)-Fe2±xRu4∓xO11 are narrow-gap semiconductors with Curie temperatures at or above room temperature.

Original languageEnglish
Pages (from-to)1315-1320
Number of pages6
JournalAdvanced Materials
Volume20
Issue number7
DOIs
StatePublished - Apr 4 2008

ASJC Scopus subject areas

  • Materials Science (all)
  • Mechanics of Materials
  • Mechanical Engineering

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