Spin dynamics in stripe-ordered La5/3Sr1/3NiO4 -: art. no. 100407

被引：52

作者：

Boothroyd, AT ^{[1
]}

Prabhakaran, D

Freeman, PG

Lister, SJS

Enderle, M

Hiess, A

Kulda, J

机构：

[1] Univ Oxford, Dept Phys, Oxford OX1 3PU, England

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.67.100407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polarized- and unpolarized-neutron inelastic scattering has been used to measure the spin excitations in the striped spin-charge-ordered phase of La5/3Sr1/3NiO4. Above 30 meV, sharp magnetic modes are observed characteristic of a static stripe lattice. This part of the energy spectrum is described well by a linear spin-wave model with intrastripe and interstripe exchange interactions between neighboring Ni spins given by J = 15 +/- 1.5 meV and J' = 7.5 +/- 1.5 meV, respectively. A pronounced suppression and broadening of the magnetic fluctuations in a band between 10 meV and 25 meV is suggestive of coupling to collective motions of the stripe domain walls.

引用

页数：4

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