Magnetic excitation spectrum ofCoCl2·2H2O
Magnetic excitation spectrum ofCoCl2·2H2O
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CoCl2·2H2O的磁激发谱
DOI：
10.1103/physrevb.10.4000
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发表时间：
1974
影响因子：
3.7
通讯作者：
H. Fogedby
中科院分区：
文献类型：
--
作者：
H. Fogedby
用解析表达式讨论了最近在各向异性磁盐CoCl 2·2 H 2 O中观察到的磁振子束缚态谱。包括与光学声子耦合的横向能谱和纵向能谱被评估为 j a H 0 中的所有阶，j a 是横向各向异性 [j a=(j x− j y) 2] 且 H 0 是所施加的磁场，并且评估为横向平均交换 j h [j h=(j x+ j y) 2] 中的二阶并以贝塞尔函数表示。在低场极限下，通过拟方法对频谱进行分析。横向和纵向强度谱具有无限连分数的形式，并且可以用贝塞尔函数表示。详细讨论了低场和零场限制。
The magnon bound-state spectrum recently observed in the anisotropic magnetic salt CoCl 2· 2 H 2 O is discussed in terms of analytic expressions. The transverse energy spectrum including the coupling to an optic phonon and the longitudinal energy spectrum are evaluated to all orders in j a H 0, j a is the transverse anisotropy [j a=(j x− j y) 2] and H 0 is the applied magnetic field, and to second order in the transverse mean exchange j h [j h=(j x+ j y) 2] and expressed in terms of Bessel functions. In the low-field limit the spectrum is analyzed by means of the quasicalssical method. The transverse and longitudinal intensity spectra have the form of infinite continued fractions and can be expressed in terms of Bessel functions. The low-field and zero-field limits are discussed in detail.