High temperature ~(63)Cu NMR and NQR studies of YBa_2Cu_4O_8 the spin gap and the phase diagram

机译：YBa_2Cu_4O_8的自旋缝隙和相图的高温〜（63）Cu NMR和NQR研究

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We report NMR a nd NQR measurements of YBa_2Cu_4O_8 from 10K to 715K. We have studied Knight shifts, K~s, spin-lattice relaxation time, T_1, and Gaussian transverse relaxation time, T_(2G). We examine the results to explore concepts of the phase diagram of the cuprates, and on scaling, and using results on antiferromagnets. The work at high temperatures is done using an unoriented powder. We observe a maximum in the Knight shift with temperature near 500K. We also find two temperatures (200K and 500K approximately) which separate different regions of behavior, as predicted by Barzykin and Pines. Using the analysis of Sokol, Glenister, and Singh, we show that at the upper temperature the correlation length is approximately 2 lattice constants.

机译：我们报告了YBa_2Cu_4O_8的NMR和NQR测量，从10K到715K。我们研究了奈特位移，K〜s，自旋晶格弛豫时间T_1和高斯横向弛豫时间T_（2G）。我们检查结果以探索铜酸盐相图的概念，缩放比例以及在反铁磁体上使用结果。高温工作是使用未取向的粉末完成的。当温度接近500K时，我们观察到奈特位移的最大值。正如Barzykin和Pines所预测的，我们还发现两个温度（大约200K和500K）将行为的不同区域分开。使用Sokol，Glenister和Singh的分析，我们表明在较高温度下，相关长度约为2个晶格常数。

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《International symposium on superconductivity;ISS'96》|1997年|p.23-28|共6页
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Charles P.Slichter; N.J.Curro; R.L.Corey; T.Imai; R.Stern; K.OHara; K.Yoshimura; M.Katoh; K.Kosuge; B.Dabrowski;
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中图分类 O5;
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YBa_2Cu_4O_8 NMR; knight shift; relaxation times; phase diagram; spin gap;

机译：YBa_2Cu_4O_8NMR;骑士班放松时间;相图旋转间隙;

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4. High temperature ~(63)Cu NMR and NQR studies of YBa_2Cu_4O_8 the spin gap and the phase diagram [C] . Charles P.Slichter, N.J.Curro, R.L.Corey, International symposium on superconductivity . 1997

机译：高温〜（63）Cu NMR和NQR研究YBA_2CU_4O_8旋转间隙和相图
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High temperature ~(63)Cu NMR and NQR studies of YBa_2Cu_4O_8 the spin gap and the phase diagram

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