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High Magnetic Field Dependence of Magnetodielectric Properties in Sr2CoSi2O7 Crystal

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Abstract

We have investigated magnetic and dielectric properties of åkermanite Sr2CoSi2O7 single crystal in which the orbital hybridization is controllable by external magnetic fields. Sr2CoSi2O7 shows the electric polarization that is originated from asymmetric orbital hybridization induced by magnetic field. This induced electric polarization was observed even at temperatures considerably higher than the magnetic transition temperature. The polarization data obtained for the paramagnetic phase are scaled with the square of the induced magnetization. By the discussion of the crystal symmetry, the space group of a polar state of åkermanite materials is probably Cmm2.

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Acknowledgements

This work was partly supported by the Ministry of Education, Culture, Sports, Science and Technology, Japan, through a Grant-in-Aid for Scientific Research (23340096).

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Authors and Affiliations

  1. The Institute for Solid State Physics, The University of Tokyo, Kashiwa, 277-8581, Japan

    M. Akaki, T. Kihara & M. Tokunaga

  2. Department of Physics, Sophia University, Tokyo, 102-8554, Japan

    M. Akaki, T. Tadokoro & H. Kuwahara

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  1. M. Akaki
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  2. T. Tadokoro
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  3. T. Kihara
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  4. M. Tokunaga
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  5. H. Kuwahara
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Correspondence to M. Akaki.

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Akaki, M., Tadokoro, T., Kihara, T. et al. High Magnetic Field Dependence of Magnetodielectric Properties in Sr2CoSi2O7 Crystal. J Low Temp Phys 170, 291–295 (2013). https://doi.org/10.1007/s10909-012-0796-z

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  • DOI: https://doi.org/10.1007/s10909-012-0796-z

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