New electric features in Cu-rich La2CuO4+δ system

B. R. Zhao, X. L. Dong, P. S. Luo, M. Gao, L. M. Peng, Z. X. Zhao, K. Watanabe, Y. M. Ni, Bo Xu

Research output: Contribution to journalArticle

Abstract

A series of light oxygen doped Cu-rich La2CuO4+δ samples, with δ<0.01 and the nominal composition of cations being La:Cu=2:1+x (0≤x≤0.18), have been investigated. Characterization shows that the samples are single phase till x≥0.10. TEM, electron energy loss spectroscopy, magnetization and electric transport measurements show that the excess Cu (the substitution of Cu2+ for La3+) can enhance the 3D antiferromagnetic (AF) exchange interaction and promote electronic phase separation. In the AF background the hole-rich cluster caused by phase separation becomes superconducting below 34 K, and shows ferromagnetism from the superconducting transition temperature Tc to above the Neel temperature TN.

Original languageEnglish
Pages (from-to)446-449
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume364-365
DOIs
Publication statusPublished - 2001 Nov

Keywords

  • Change ordering
  • Ferromagnetism
  • HTSC
  • Phase separation

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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    Zhao, B. R., Dong, X. L., Luo, P. S., Gao, M., Peng, L. M., Zhao, Z. X., Watanabe, K., Ni, Y. M., & Xu, B. (2001). New electric features in Cu-rich La2CuO4+δ system. Physica C: Superconductivity and its applications, 364-365, 446-449. https://doi.org/10.1016/S0921-4534(01)00818-8