Spontaneous emergence of free carrier at phase transitions of insulating BaTiO3 single crystals: Experimental analyses

Mizuki Yamato, Yosuke Urakami, Daisuke Matsumoto, Hirotaka Yoshioka, Yukio Watanabe

研究成果: ジャーナルへの寄稿学術誌査読

4 被引用数 (Scopus)

抄録

The conductance of BaTiO 3 and the relaxor single crystals is measured. Unlike conventional insulators, the stoichiometric crystals in which the conductance due to the impurities are rendered negligible exhibit an intrinsic conductance that is manifested as the sharp peaks at the phase transitions, and the peaks become evident with purity, and its values are nearly independent of the samples that are grown by the different methods and the conditions, whereas the conductance above T C depends critically on the samples. Especially, these findings are verified by the measurements of the current at constant voltages. These observations elucidate that the ferroelectrics posses a carrier generation mechanism, which has been invisible in semiconducting samples.

本文言語英語
ページ(範囲)169-180
ページ数12
ジャーナルFerroelectrics
336
DOI
出版ステータス出版済み - 7月 1 2006

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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