Nuclear Spin–Lattice Relaxation of Single Crystal Sr14Cu24O41 |
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| Authors: | S Ohsugi S Matsumoto Y Kitaoka M Matsuda M Uehara T Nagata J Akimitsu |
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| Institution: | (1) Department of Electrical Engineering and Electronics, College of Industrial Technology, Nishikoya 1-27-1, Amagasaki Hyogo, 661-0047, Japan;(2) Tsukuba Magnet Laboratory, National Institute for Materials Science, Tsukuba Ibaraki, 305-0003, Japan;(3) Department of Physical Science, Graduate School of Engineering Science, Osaka University, Toyonaka Osaka, 560-8531, Japan;(4) Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai Ibaraki, 319-1195, Japan;(5) Department of Physics, Aoyama-Gakuin University, Chitosedai, Setagaya-ku, Tokyo 157-0071, Japan;(6) Department of Physics, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan |
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| Abstract: | Nuclear spin–lattice relaxation rate T
1
−1 has been measured for the ladder sites of two single crystals Sr14Cu24O41 (Sr14-A,B) by 63Cu NMR/NQR. The hole localization around 100 K appears as a peak in the T variation of T
1
−1(NQR). On the other hand, it is suppressed in the T
1
−1 (NMR) data under the magnetic field H ∼ 11 T, and a new peak appears around 20 K. T
1
−1(NMR) around the peak is more enlarged for Sr14-B than for Sr14-A. Hence, holes on the ladders of Sr14-B tend to be more localized.
This is considered to be an origin for the occurrence of the magnetic order in Sr14-B under H ∼ 11 T. |
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| Keywords: | Cu NMR/NQR magnetic ordering nuclear spin– lattice relaxation spin ladder Sr14Cu24O41 |
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