High-pressure synthesis, crystal structure and magnetic property of ilmenite-type FeGeO3

Daisuke Nakatsuka, Takashi Yoshino, Jun Kano, Hideki Hashimoto, Makoto Nakanishi, Jun Takada, Tatsuo Fujii

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We synthesized well-crystallized ilmenite-type FeGeO3 to investigate its structural and magnetic properties. Ilmenite-type FeGeO 3 were synthesized by high-pressure synthesis technique using a Kawai-type multi-anvil apparatus. Their structural and magnetic properties were examined by XRD analysis with Rietveld refinement, transmission electron microscopy, Mössbauer spectroscopy and SQUID-magnetization measurements. The subsequent annealing after the high-pressure synthesis was effective to improve the crystallinity of the ilmenite-type FeGeO3. The primary particle size of ilmenite-type FeGeO3 was ∼15 nm. Some particles seemed to be covered with non- or poorly crystalline phase even after the annealing, and others showed a lamellar microstructure parallel to the (0 0 1) plane. Theilmenite-type FeGeO3 showed typical antiferromagnetic behavior with the Néel temperature of 79 K.

Original languageEnglish
Pages (from-to)520-524
Number of pages5
JournalJournal of Solid State Chemistry
Volume198
DOIs
Publication statusPublished - Feb 1 2013

Keywords

  • Fe Mössbauer spectroscopy
  • High-pressure synthesis
  • Ilmenite-FeGeO
  • Rietveld refinement
  • SQUID magnetometry
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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