Mixed spinel structure in nanocrystalline NiFe2O4

C. N. Chinnasamy, A. Narayanasamy, N. Ponpandian, K. Chattopadhyay, K. Shinoda, B. Jeyadevan, K. Tohji, K. Nakatsuka, T. Furubayashi, I. Nakatani

Research output: Contribution to journalArticle

339 Citations (Scopus)

Abstract

Nanocrystalline NiFe2O4 spinel has been synthesized with various grain sizes by high-energy ball milling. From the high-field magnetization studies and extended x-ray-absorption fine-structure, and Mössbauer measurements in an external magnetic field of 5 T applied parallel to the direction of gamma rays, we could observe that Ni2+ ions occupy tetrahedral sites on grain-size reduction due to milling. The Fe3+ spins have a canted structure and the canting angle increases with grain-size reduction. It is possible that the core Fe3+ spins are also canted because of the magnetocrystalline anisotropy introduced by the occupancy of the Ni2+ ions in the tetrahedral sites.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number18
DOIs
Publication statusPublished - 2001 Apr 20

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Mixed spinel structure in nanocrystalline NiFe<sub>2</sub>O<sub>4</sub>'. Together they form a unique fingerprint.

  • Cite this

    Chinnasamy, C. N., Narayanasamy, A., Ponpandian, N., Chattopadhyay, K., Shinoda, K., Jeyadevan, B., Tohji, K., Nakatsuka, K., Furubayashi, T., & Nakatani, I. (2001). Mixed spinel structure in nanocrystalline NiFe2O4. Physical Review B - Condensed Matter and Materials Physics, 63(18). https://doi.org/10.1103/PhysRevB.63.184108