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Journal of Low Temperature Physics

, Volume 170, Issue 5–6, pp 291–295 | Cite as

High Magnetic Field Dependence of Magnetodielectric Properties in Sr2CoSi2O7 Crystal

  • M. Akaki
  • T. Tadokoro
  • T. Kihara
  • M. Tokunaga
  • H. Kuwahara
Article

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.

Keywords

Multiferroics Magnetoelectric effects Antiferromagnetism Cobaltite 

Notes

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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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • M. Akaki
    • 1
    • 2
  • T. Tadokoro
    • 2
  • T. Kihara
    • 1
  • M. Tokunaga
    • 1
  • H. Kuwahara
    • 2
  1. 1.The Institute for Solid State PhysicsThe University of TokyoKashiwaJapan
  2. 2.Department of PhysicsSophia UniversityTokyoJapan

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