TY - JOUR
T1 - Gyroscopic g factor of rare earth metals
AU - Ogata, Y.
AU - Chudo, H.
AU - Ono, M.
AU - Harii, K.
AU - Matsuo, M.
AU - Maekawa, S.
AU - Saitoh, E.
N1 - Funding Information:
The authors thank Y. Haga for valuable discussions and S. Okayasu for technical support. This work was financially supported by ERATO, JST, a Grant-in-Aid for Scientific Research on Innovative Areas Nano Spin Conversion Science (26103005) from MEXT, Japan, a Grant-in-Aid for Scientific Research A (26247063) from MEXT, Japan, a Grant-in-Aid for Scientific Research B (16H04023) from MEXT, Japan, a Grant-in-Aid for Scientific Research C (15K05153 and 16K06805) from MEXT, Japan, and a Grant-in-Aid for Young Scientists B (16K18353) from MEXT, Japan.
Publisher Copyright:
© 2017 Author(s).
PY - 2017/2/13
Y1 - 2017/2/13
N2 - We develop the in situ magnetization measurement apparatus for observing the Barnett effect consisting of a fluxgate sensor, a high speed rotor with frequencies of up to 1.5 kHz, and a magnetic shield at room temperature. The effective magnetic field (Barnett field) in a sample arising from rotation magnetizes the sample and is proportional to the rotational frequency. The gyroscopic g factor, g ′, of rare earth metals, in particular, Gd, Tb, and Dy, was estimated to be 2.00 ± 0.08, 1.53 ± 0.17, and 1.15 ± 0.32, respectively, from the slopes of the rotation dependence of the Barnett field. This study provides a technique to determine the g ′ factor even in samples where the spectroscopic method may not be available.
AB - We develop the in situ magnetization measurement apparatus for observing the Barnett effect consisting of a fluxgate sensor, a high speed rotor with frequencies of up to 1.5 kHz, and a magnetic shield at room temperature. The effective magnetic field (Barnett field) in a sample arising from rotation magnetizes the sample and is proportional to the rotational frequency. The gyroscopic g factor, g ′, of rare earth metals, in particular, Gd, Tb, and Dy, was estimated to be 2.00 ± 0.08, 1.53 ± 0.17, and 1.15 ± 0.32, respectively, from the slopes of the rotation dependence of the Barnett field. This study provides a technique to determine the g ′ factor even in samples where the spectroscopic method may not be available.
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U2 - 10.1063/1.4976998
DO - 10.1063/1.4976998
M3 - Article
AN - SCOPUS:85013277235
SN - 0003-6951
VL - 110
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 7
M1 - 072409
ER -