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Hall coefficients of Nd2−χCeχCuO4thin films

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/0921-4534(91)91849-y
Disciplines
  • Physics

Abstract

Abstract Cerium concentration dependence of Hall coefficient in Nd 2−χCe χCuO 4 thin films has been examined. It is confirmed that the Hall coefficient R H at Ce concentration of χ ∼ 0.15 where the superconducting critical temperature T c becomes maximum is negative. It is found, however, that R H changes rapidly for positive behavior with a small increase of Ce concentration, and finally becomes completely positive in the whole temperature range below 300 K at Ce concentration values where the system is still superconductive. A confusion in the sign of the carriers in bulk samples is thought to originate from a Ce distribution nonuniformity in these samples.

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