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

作     者：H. Kotegawa Y. Tokunaga Y. Araki G.-q. Zheng Y. Kitaoka K. Tokiwa K. Ito T. Watanabe A. Iyo Y. Tanaka H. Ihara 

作者机构：Department of Physical Science Graduate School of Engineering Science Osaka University Toyonaka Osaka 560-8531 Japan Core Research for Evolutional Science and Technology (CREST) of the Japan Science and Technology Corporation (JST) Kawaguchi Saitama 332-0012 Japan Department of Applied Electronics Science University of Tokyo Yamazaki Noda Chiba 278-8510 Japan National Institute of Advanced Industrial Science and Technology (AIST) Umezono Tsukuba 305-8568 Japan 

出 版 物：《Physical Review B》 (物理学评论B辑：凝聚态物质与材料物理学)

年 卷 期：2004年第69卷第1期

页      面：014501-014501页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

摘      要：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 ∼0.02μB at the SC OP, which is the AF proximity effect into the SC OP.