ANOMALOUS SPIN-DIFFUSION IN A 2-DIMENSIONAL PERCOLATING ISING ANTIFERROMAGNET

被引：9
|
作者：
IKEDA, H [1 ]
ITOH, S [1 ]
ADAMS, MA [1 ]
机构：
[1] RUTHERFORD APPLETON LAB,ISIS FACIL,DIDCOT OX11 0QX,OXON,ENGLAND
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 24期
关键词：
D O I：
10.1103/PhysRevLett.75.4440
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Anomalous diffusive motions of spins in a near-percolating Ising antiferromagnet, Rb2Co0.6Mg0.4F4, have been observed by high-energy-resolution neutron inelastic scattering. The scattering function integrated over momentum space in the paramagnetic phase reveals a long-tailed spectrum having the form E(-(0.35+/-0.06)) superimposed on the Lorentzian line shape, which originates from the normal critical magnetic scattering. This observation of a power-law decay function is a direct measurement of anomalous diffusion in a system with fractal geometry.
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收藏
页码：4440 / 4443
页数：4
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