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Observation of the Sagnac Effect in the Magnetization of Magnetic Nanoparticles in Water

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Abstract

A square optical loop used to observe the Sagnac effect was constructed by using a 632.8-nm He-Ne laser, a polarizing beam splitter and three mirrors, combined with a detection system. When a magnetic field was applied from the transversal direction to the beam of the loop, which passed through the sample cell containing magnetic nanoparticles (MNPs) in water, Sagnac interference was observed depending on the concentration of MNPs, indicating evolution of the magnetic birefringence. A possible analytical use of the magnetic Sagnac effect has been suggested.

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Acknowledgments

The authors thank Prof. D. A. Van Baak of Calvin College for giving valuable advice and Prof. T. Itoh for providing facility in Institute for NanoScience Design, Osaka University. This study was financially supported by the Grant-in Aid for Scientific Research (B) (No. 262880660) and Challenging Exploratory Research (No. 256201120) of the Ministry of Education, Culture, Sports, Science and Technology of Japan.

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Authors and Affiliations

  1. Institute for NanoScience Design, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan

    Hitoshi Watarai, Ziyu Chen & Siyu Chen

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  1. Hitoshi Watarai
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  2. Ziyu Chen
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  3. Siyu Chen
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Correspondence to Hitoshi Watarai.

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Watarai, H., Chen, Z. & Chen, S. Observation of the Sagnac Effect in the Magnetization of Magnetic Nanoparticles in Water. ANAL. SCI. 32, 715–717 (2016). https://doi.org/10.2116/analsci.32.715

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  • DOI: https://doi.org/10.2116/analsci.32.715

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