Spin Correlation in High-T_c Cuprate HgBa_2Ca_2Cu_3O_<8+δ> with T_c=133 K : An Origin of T_c-Enhancement Evidenced by ^<63>Cu-NMR Study
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概要
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The Knight shift, the nuclear spin-lattice relaxation rate, 1/T_1, and the transverse relaxation rate, 1/T_<2G>, of ^<63>Cu have been separately measured for the square and the pyramidal CuO_2 planes in HgBa_2Ca_2Cu_3O_<8+δ> (Hg1223) with the highest transition temperature, T_c=133K to date. From the quantitative analysis of 1/T_1 and 1/T_<2G>, it is shown that the product of the staggered susceptibility and the characteristic energy of spin fluctuations around a zone boundary, X_QΓ_Q, for the square CuO_2 plane site is larger than that for YBa_2Cu_3O_7 (YBCO_7), although that for the pyramidal CuO_2 plane site is almost the same. This enhancement of X_QΓ_Q for the square site is considered to be responsible for the higher T_c in Hg1223 than in YBCO_7.
- 社団法人日本物理学会の論文
- 1995-12-15
著者
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KITAOKA Yoshio
Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka Universit
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ZHENG Guo-qing
Department of Physics, Okayama University
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Asayama Kunisuke
Department of Material Physics, Faculty of Engineering Science, Osaka University
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Asayama Kunisuke
Department Of Physical Science Graduate School Of Engineering Science Osaka University
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Asayama Kunisuke
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Zheng G‐q
Department Of Physical Science Graduate School Of Engineering Science Osaka University
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Kohori Y
Chiba Univ. Chiba
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Iyo A
National Institute Of Advanced Industrial Science And Technology (aist)
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Iyo Akira
Electrotechnical Laboratory:core Research For Evolutional Science And Technology (crest) Of The Japa
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IHARA Hideo
Electrotechnical Laboratory
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Ihara H
Electrotechnical Lab. Ibaraki
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Karaki Y
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Kitaoka Yoshio
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Magishi Ko-ichi
Department of Material Physics, Faculty of Engineering Science, Osaka University
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Tokiwa Kazuyasu
Electrotechnical Laboratory
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Magishi Ko-ichi
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Zheng Guo-qing
Department Of Physical Science Graduate School Of Engineering Science Osaka University
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Tokiwa K
Applied Electronics Faculty Of Industrial Science And Technology Tokyo University Of Science
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Tokiwa Kazuyasu
Applied Electronics Faculty Of Industrial Science And Technology Tokyo University Of Science
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KITAOKA Yoshio
Department of Material Physics, Faculty of Engineering Science Osaka University
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Asayama Kunisuke
Department of Material Physics, Faculty of Engineering Science, Osaka University:Presently Professor Emeritus of Osaka University
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Iyo Akira
Electrotechnical Laboratory
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