LOW-FREQUENCY SPIN DYNAMICS IN UNDOPED AND SR-DOPED LA2CUO4

被引：268

作者：

IMAI, T

SLICHTER, CP

YOSHIMURA, K

KOSUGE, K

机构：

[1] UNIV ILLINOIS,DEPT PHYS,LOOMIS LAB PHYS,URBANA,IL 61801

[2] UNIV ILLINOIS,DEPT CHEM,URBANA,IL 61801

[3] UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801

[4] KYOTO UNIV,FAC SCI,DEPT CHEM,KYOTO 606,JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.70.1002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report Cu-63 NQR and NMR studies of low frequency spin dynamics in the paramagnetic state of La2-xSrxCuO4 for 0 less-than-or-equal-to x less-than-or-equal-to 0.15 in the temperature range up to 900 K. For x = 0, the results were in good agreement with the theoretical predictions for an S = 1/2 two-dimensional quantum Heisenberg antiferromagnet. For Sr-doped samples, we found that d spins exhibit, above 300 K, the.characteristic behavior expected for a local moment system even for the highest-T(c) phase La1.85Sr0.15CuO4, and cross over to an itinerant regime before superconductivity sets in.

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页码：1002 / 1005

页数：4

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