TETRACRITICAL DYNAMICS OF CSMNBR3

被引：13
|
作者：
MASON, TE
YANG, YS
COLLINS, MF
GAULIN, BD
CLAUSEN, KN
HARRISON, A
机构：
[1] MCMASTER UNIV, DEPT PHYS, HAMILTON L8S 4M1, ONTARIO, CANADA
[2] RISO NATL LAB, DEPT PHYS, DK-4000 ROSKILDE, DENMARK
[3] ATOM ENERGY CANADA LTD, RES, NEUTRON & SOLID STATE PHYS, CHALK RIVER K0J 1J0, ONTARIO, CANADA
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1992年 / 104卷
关键词：
D O I：
10.1016/0304-8853(92)90763-E
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Neutron inelastic scattering has been used to measure the spin dynamics of the chiral antiferromagnet CsMnBr3 at the tetracritical point. Close to the magnetic zone centre, dynamical scaling is observed to hold with a critical exponent z = 1.47 +/- 0.06. Further away from the ordering wavevector well-defined excitations are observed whose energies show surprisingly little renormalization relative to the low temperature spin wave energies. The lineshape of the scattering at these large wavevectors is well described by a theoretical form due to Halperin and Hohenberg.
引用
收藏
页码：197 / 198
页数：2
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