한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제44권6호
  • /
  • Pages.308-312
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  • 2007
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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Lanthanum이 첨가된BiFeO3−PbTiO3 세라믹스의 전자효과에 대한 연구

A Study on the Magnetoelectric Effect in Lanthanum Modified BiFeO3−PbTiO3 Ceramics

  • Lee, Eun-Gu (Department of Advanced Materials Engineering, Chosun University) ;
  • Kim, Sun-Jae (Department of Advanced Institute of Nano Technologies, Sejong University) ;
  • Lee, Jae-Gab (School of Advanced Materials Engineering, Kookmin University)
  • 발행 : 2007.06.30
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초록

Ferroelectric, magnetic, and magnetoelectric effects for lanthanum modified $BiFeO_3-PbTiO_3$ ceramics have been investigated. The data show that magnetoelectric polarization coefficient, ${\alpha}_p$ is due to a linear coupling between polarization and magnetization, and that ${\alpha}_p$ is independent of dc magnetic bias and ac magnetic field. The values of ${\alpha}_p$ and magnetic induced susceptibility for lanthanum modified $BiFeO_3-PbTiO_3$ ceramics are much larger than those of single $BiFeO_3$ crystal. We believe that the magnetoelectric effect is significantly enhanced by breaking of the cycloidal spin state of a long-period spiral spin structure due to randomly distributed charged imperfections.

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참고문헌

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