Possibility of negative exchange interaction effect in RE-Ba-Cu oxides

Y. Koike, T. Nakanomyo, T. Hanaguri, T. Nomoto, T. Fukase

Research output: Contribution to journalArticlepeer-review


Superconducting transition of (RE)xBa1-xCuOy (RE: rare earth or Y; 0.25≦x≦0.40) has been studied in magnetic fields up to 6T. Two-step transitions due to higher-Tc and lower-Tc phases have been observed, depending on the RE ion radius. Anomalous hysteresis of the resistivity in the field sweep has been found in the transition region of the lower-Tc phase. This is explained by assuming the exchange interaction between localized Cu spins and conduction electrons to be negative and taking account of the Jaccarino-Peter effect.

Original languageEnglish
Pages (from-to)446-448
Number of pages3
JournalPhysica B+C
Issue number1-3
Publication statusPublished - 1987 Dec

ASJC Scopus subject areas

  • Engineering(all)


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