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

研究成果: Article査読

抄録

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.

本文言語English
ページ(範囲)446-449
ページ数4
ジャーナルPhysica C: Superconductivity and its applications
364-365
DOI
出版ステータスPublished - 2001 11

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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