Coexistence of superconductivity and antiferromagnetism in multilayered high-Tc superconductor HgBa2Ca4Cu5Oy: Cu-NMR study

H. Kotegawa, Y. Tokunaga, Y. Araki, G. Q. Zheng, Y. Kitaoka, K. Tokiwa, K. Ito, T. Watanabe, A. Iyo, Y. Tanaka, H. Ihara

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80 Citations (Scopus)

Abstract

We report a coexistence of superconductivity and antiferromagnetism in five-layered compound HgBa2Ca4Cu5Oy (Hg-1245) with Tc = 108K, which is composed of two types of CuO2 planes in a unit cell; three inner planes (IP’s) and two outer planes (OP’s). The Cu-NMR study has revealed that the optimally doped OP undergoes a superconducting (SC) transition at Tc = 108K, whereas the three underdoped IP’s do an antiferromagnetic (AF) transition below TN∼60K with the Cu moments of ∼(0.3−0.4)μB. Thus bulk superconductivity with a high value of Tc = 108K and a static AF ordering at TN = 60K are realized in the alternating AF and SC layers. The AF-spin polarization at the IP is found to induce the Cu moments of ∼μB at the SC OP, which is the AF proximity effect into the SC OP.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume69
Issue number1
DOIs
Publication statusPublished - Jan 12 2004
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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