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arXiv · 1708.09207

100 MHz high-speed strain monitor using fiber Bragg grating and optical filter applied for magnetostriction measurements of cobaltite at magnetic fields beyond 100 T

Akihiko Ikeda·Toshihiro Nomura·Yasuhiro H. Matsuda·Shuntaro Tani·Yohei Kobayashi·Hiroshi Watanabe·Keisuke Sato
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Abstract

High-speed 100 MHz strain monitor using fiber Bragg grating (FBG) and an optical filter has been devised for the magnetostriction measurements under ultrahigh magnetic fields. The longitudinal magnetostriction of LaCoO$_{3}$ has been measured at room temperature, 115, 7 and 4.2 K up to the maximum magnetic field of 150 T. The field-induced lattice elongations are observed, which are attributed to the spin-state crossover from the low-spin ground state to excited spin-states.

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Akihiko Ikeda, Toshihiro Nomura, Yasuhiro H. Matsuda, Shuntaro Tani, Yohei Kobayashi, Hiroshi Watanabe, Keisuke Sato. 2017-09-02. 100 MHz high-speed strain monitor using fiber Bragg grating and optical filter applied for magnetostriction measurements of cobaltite at magnetic fields beyond 100 T. https://doi.org/10.1016/j.physb.2017.09.017

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