Antiferromagnetism in the vortex cores of YBa2Cu3O7-δ -: art. no. 220503

被引:38
|
作者
Mitrovic, VF [1 ]
Sigmund, EE
Halperin, WP
Reyes, AP
Kuhns, P
Moulton, WG
机构
[1] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA
[2] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
关键词
D O I
10.1103/PhysRevB.67.220503
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report spatially resolved nuclear-magnetic-resonance measurements on a high-temperature superconductor that indicate the presence of correlated antiferromagnetic fluctuations in the vortex core. The nuclear-spin-lattice relaxation rate 1/T-17(1) of planar O-17, in near-optimally doped YB2Cu3O7-delta, was measured. Outside of the core, ((T1T)-T-17)(-1) is independent of temperature consistent with theoretical predictions for a d-wave superconductor. In the vortex core, ((T1T)-T-17)(-1) increases with decreasing temperature following an antiferromagnetic Curie-Weiss law.
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页数:4
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