Barnett effect in paramagnetic states

Masao Ono, Hiroyuki Chudo, Kazuya Harii, Satoru Okayasu, Mamoru Matsuo, Jun'Ichi Ieda, Ryo Takahashi, Sadamichi Maekawa, Eiji Saitoh

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We report the observation of the Barnett effect in paramagnetic states by mechanically rotating gadolinium (Gd) metal with a rotational frequency of up to 1.5 kHz above the Curie temperature. An in situ magnetic measurement setup comprising a high-speed rotational system and a fluxgate magnetic sensor was developed for the measurement. Temperature dependence of the observed magnetization follows that of paramagnetic susceptibility, indicating that any emergent magnetic field is proportional to the rotational frequency and is independent of temperature. From the proportionality constant of the emergent field, the gyromagnetic ratio of Gd is calculated to be -29±5GHz/T. This study revisits the primordial issue of magnetism with modern technologies to shed new light on the fundamental spin-rotation coupling.

Original languageEnglish
Article number174424
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number17
DOIs
Publication statusPublished - 2015 Nov 30

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Ono, M., Chudo, H., Harii, K., Okayasu, S., Matsuo, M., Ieda, JI., Takahashi, R., Maekawa, S., & Saitoh, E. (2015). Barnett effect in paramagnetic states. Physical Review B - Condensed Matter and Materials Physics, 92(17), [174424]. https://doi.org/10.1103/PhysRevB.92.174424