Diluted quasi-one-dimensional classical antiferromagnets.
Diluted quasi-one-dimensional classical antiferromagnets.
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稀释的准一维经典反铁磁体。
DOI：
10.1103/physrevb.48.9478
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Shender
中科院分区：
文献类型：
--
作者：
Korenblit;Shender
我们考虑了交换失序，主要是非磁性稀释对准一维经典反铁磁体低温性质的影响。缺陷浓度下的动态磁化率扩展表明，即使低掺杂水平也会显著改变自旋波刚度和横向磁化率。我们研究了当杂质浓度超过小特征值x 0 =√J⊥/J∥时产生的自旋波速度和磁化率的非摄动浓度依赖性。一个关于具有非波动各向异性的无序非受挫反铁磁体的激发谱的一般结果，也适用于真正的三维反铁磁体
We consider the effect of the exchange disordering, mainly the nonmagnetic dilution, on the low-temperature properties of the quasi-one-dimensional classical antiferromagnets. Dynamic susceptibility expansion in defect concentration shows that even a low level of doping substantially changes the spin-wave stiffness and the transverse susceptibility. We investigate the nonperturbative concentration dependencies of the spin-wave velocities and susceptibility arising when the impurity concentration exceeds the small characteristic value x 0 =√J⊥/J∥. A general result, pertinent to the true three-dimensional antiferromagnets as well, concerns the excitation spectrum of the disordered nonfrustrated antiferromagnets with nonfluctuating anisotropy