NEUTRON-SCATTERING STUDY OF YBA2CU3O6+X SINGLE-CRYSTALS

被引：74

作者：

ROSSATMIGNOD, J ^{[1
]}

REGNAULT, LP ^{[1
]}

JURGENS, MJ ^{[1
]}

VETTIER, C ^{[1
]}

BURLET, P ^{[1
]}

HENRY, JY ^{[1
]}

LAPERTOT, G ^{[1
]}

机构：

[1] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

来源：

PHYSICA B | 1990年 / 163卷 / 1-3期

关键词：

D O I：

10.1016/0921-4526(90)90115-B

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Inelastic neutron scattering studies of YBa2Cu3O6+x single crystals are reported. In the pure AF phase (x = 0.15, TN = 410 K) the 2D-character of the spin wave spectrum and the exchange parameters have been established. A small amount of p holes in CuO2 planes (x = 0.37, TN = 180 K,m nh = 1.8%) strongly modifies the spin dynamics at low q: strong damping of in-plane spin excitations and renormalization of the spin wave velocity. In the superconducting state (x = 0.45, Tc = 34.8 K) we have found dynamical magnetic correlations and an anomalous decrease of the intensity at low energy in the vicinity of Tc. © 1990.

引用

页码：4 / 8

页数：5

共 7 条

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ROSSATMIGNOD, J
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VETTIER, C
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