Hall effect and substitution effect in Pb2Sr2Y1-xCaxCu3O8+δ

Hiromu Sunagawa, Nasahiro Kaiwa, Yoji Koike, Takashi Noji, Yoshitami Saito

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5 Citations (Scopus)

Abstract

The Hall effect of ceramic samples of Pb2Sr2Y1-xCaxCu3O8 has been investigated for 0 ≦ x ≦ 0.5. The Hall coefficient RH is positive and decreases with increasing x, which is explained within the doped Mott-Hubbard model. For x < 0.1, RH increases with decreasing temperature like a conventional semiconductor. For x= 0.1, RH is almost constant. For 0.2 ≦ x ≦ 0.5, where Tc appears, RH increases with decreasing temperature again, and 1/RHe is expressed as αT + β (α > 0, β > 0). The temperature coefficient α increases with increasing Tc. These temperature dependences of RH are common to high-Tc oxides. Effects of the partial substitution of Fe, Co, Ni, Zn, Ga for Cu on Tc have been also studied for x = 0.5. The decrease in Tc is marked in order of Ga, Co, Zn, Ni, Fe. This is discussed in relation to experimental results on YBa2Cu3O7.

Original languageEnglish
Pages (from-to)1271-1272
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume185-189
Issue numberPART 2
DOIs
Publication statusPublished - 1991 Dec 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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