SUBLATTICE EFFECTS IN MAGNETIC RESONANCE
SUBLATTICE EFFECTS IN MAGNETIC RESONANCE
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DOI：
10.1103/physrev.91.1085
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发表时间：
1953-01-01
期刊：
影响因子：
--
通讯作者：
WANGSNESS, RK
中科院分区：
文献类型：
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作者：
WANGSNESS, RK
计算了含有两个或四个不同磁比的磁亚晶格系统的共振频率。结果发现，在许多情况下，结果可以归结为铁磁和反铁磁共振的标准公式；然而，它们是用等于系统的净磁矩和净角动量之商的有效回旋磁比来表示的。本文还讨论了由于几个频率接近相等的正态模的存在而引起的线分裂，以及子晶格结构对各向异性对线宽贡献的影响。对铁酸镍-铝酸盐的有效g值和线宽随成分变化的计算值与实验结果进行了比较。
The resonance frequencies of a system containing two or four magnetic sublattices with different gyro-magnetic ratios are calculated. It is found that in many cases the results reduce to the standard formulas of ferromagnetic and antiferromagnetic resonance; they are stated, however, in terms of an effective gyromagnetic ratio equal to the quotient of the net magnetic moment and the net angular momentum of the system. Line splitting due to the existence of several normal modes of nearly equal frequencies, and the effect of the sublattice structure upon the anisotropy contribution to the line width are also discussed. The calculated values of effective g values and line widths as a function of composition are compared with the experimental results for the nickel ferrite-aluminates.