Enhanced orbital magnetic moment in FeCo nanogranules observed by Barnett effect

Y. Ogata, H. Chudo, B. Gu, N. Kobayashi, M. Ono, K. Harii, M. Matsuo, E. Saitoh, S. Maekawa

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The gyroscopic g factor, g, of FeCo nanogranules embedded in a matrix of MgF2 (FeCo-MgF2) was determined by measuring the magnetic-field generation from a rotating sample due to the Barnett effect. The g value of the FeCo-MgF2 is estimated to be 1.76 ± 0.11. The orbital contribution to the magnetic moment in the FeCo nanogranules was found to be quite large compared with that in bulk FeCo, being consistent with a density-functional-theory calculation that shows that the orbital magnetic moment may increase at the FeCo/MgF2 interfaces. The result suggests that the orbital magnetic moment is enhanced by symmetry breaking at the surface of the FeCo nanogranules.

Original languageEnglish
Pages (from-to)329-331
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume442
DOIs
Publication statusPublished - 2017 Nov 15

Keywords

  • 3D transition metal
  • Barnett effect
  • Gyroscopic g factor
  • Mechanical rotation
  • Nanogranule

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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