Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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The electrical property of $\alpha-Fe_{2}O_{3}$ containing small amounts of added titanium from DLTS

DLTS법에 의한 $\alpha-Fe_{2}O_{3}$ - $TiO_2$ 계 산화물의 전기적 특성

  • Kang, H.B. (Depart. of Electrical Engineering, Korea University) ;
  • Choi, B.K. (Depart. of Electrical Engineering, Korea University) ;
  • Sung, Y.K. (Depart. of Electrical Engineering, Korea University)
  • 강희복 (고려대학교 전기공학과) ;
  • 최복길 (고려대학교 전기공학과) ;
  • 성영권 (고려대학교 전기공학과)
  • Published : 1989.11.25
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Abstract

Electrical conductivity, I - V and DLTS have been measured on polycrystalline samples of $\alpha-Fe_{2}O_{3}$ containing small deviation from stoichiometry and small amounts of added titanium. DLTS (Deep Level Transient Spectroscopy) in the current transient mode has been applied to the measurement of the trap density at the grain boundary. Titanium enters the $\alpha-Fe_{2}O_{3}$ lattice substitutionally as $Ti^{4+}$, thus producing an $Fe^{2+}$ and maintaining the average charge per cation at three. The $Fe^{2+}$acts as a donor center with respect to the surrounding $Fe^{3+}$ions.

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