TY - JOUR
T1 - Barnett effect in paramagnetic states
AU - Ono, Masao
AU - Chudo, Hiroyuki
AU - Harii, Kazuya
AU - Okayasu, Satoru
AU - Matsuo, Mamoru
AU - Ieda, Jun'Ichi
AU - Takahashi, Ryo
AU - Maekawa, Sadamichi
AU - Saitoh, Eiji
N1 - Publisher Copyright:
© 2015 American Physical Society.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2015/11/30
Y1 - 2015/11/30
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.92.174424
DO - 10.1103/PhysRevB.92.174424
M3 - Article
AN - SCOPUS:84982786643
VL - 92
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 17
M1 - 174424
ER -