Enhanced magnetism of perovskite oxides, Sr(Sn,Fe)O3-δ, by substitution of nonmagnetic Ca and Ti ions

Kiyoshi Nomura*, Shigeyo Suzuki, Tomoya Mizunuma, Yuya Koike, Atsushi Okazawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Magnetic properties of perovskite oxides, SrSn1-xFexO3-δ (x ≤ 0.15), substituted with nonmagnetic Ca and Ti ions were studied. XRD patterns showed the orthorhombic structure (close to tetragonal) of (Sr1-yCay)(Sn1-xFex)O3-δ and Sr(Sn1-x-yFexTiy)O3-δ. The cell volumes decreased with the increase of Ca and Ti doping rates. Although Ti-substituted Sr(Sn, Fe)O3-δ showed small saturation magnetizations as compared with non-Ti substituted one, the magnetization increased a little with Ti doping rates up to 15%. On the other hand, all Ca-substituted Sr(Sn, Fe)O3-δ showed larger saturation magnetization than non-Ca substituted one. Two doublets of Fe3+ and a doublet of Fe4+ were observed in Mössbauer spectra of Ca-substituted Sr(Sn, Fe)O3-δ with weak ferromagnetism, and two sextets of high spin Fe3+ were additionally observed in Mössbauer spectra of Ca-doped Sr(Sn, Fe)O3-δ with relatively strong ferromagnetism. When Sr(Sn, Fe)O3-δ were further codoped with Ca and Ti ions, they showed the stable and enhanced ferromagnetic properties. It is considered that magnetic polarons among high spin Fe3+ species are overlapped by shrinking or deforming the crystal structure of perovskite oxides. That is the magnetism induced by a chemical pressure of perovskite oxides.

Original languageEnglish
Article number81
JournalHyperfine Interactions
Issue number1
Publication statusPublished - 2017 Nov 1
Externally publishedYes


  • (Sr, Ca)(Sn, Fe)O
  • (Sr, Ca)(Sn, Fe, Ti)O
  • Chemical pressure
  • Dilute magnetism
  • Fe, Ca, Ti doping
  • Magnetic property
  • Mössbauer
  • Sr(Sn, Fe, Ti)O
  • SrSnO
  • Unit cell volume

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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