论文标题
旋转重新定位转变的铁磁共振频率的非平凡温度依赖性
Nontrivial temperature dependence of ferromagnetic resonance frequency for spin reorientation transitions
论文作者
论文摘要
我们发现铁电磁共振（FMR）频率的异常温度依赖性$ f _ {\ rm r} $用于自旋纠正（SR）过渡，其中易于轴根据温度而变化，根据温度变化，在nd $ _2 $ _2 $ _2 $ _2 $ _ nd $ _ {14 $ _ {$ _ {$ b：$ f i}中观察到的温度变化。过渡温度（$ t _ {\ rm r} $），在$ t _ {\ rm rm r} $附近的$ f _ {\ rm r} $急剧增加，并在较高温度下的峰值下降。 SR过渡会导致FMR频率在广泛的温度区域中引起异常行为是不平凡的。我们通过理论和计算分析显示了温度依赖性的机理。我们得出了$ f _ {\ rm r} $与磁化之间的一般关系，以帮助理解机制，并澄清横向磁化强度的波动是所有温度区域共振的关键成分。
We find unusual temperature dependence of the ferromagnetic resonance (FMR) frequency $f_{\rm R}$ for the spin-reorientation (SR) transition, in which the easy axis changes depending on temperature, observed in the Nd permanent magnet, Nd$_2$Fe$_{14}$B: $f_{\rm R} \sim 0$ below the SR transition temperature ($T_{\rm R}$), drastic increase of $f_{\rm R}$ around $T_{\rm R}$, and decrease from a peak at higher temperatures. It is nontrivial that the SR transition causes the unusual behavior of the FMR frequency in a wide temperature region. We show the mechanism of the temperature dependence by theoretical and computational analyses. We derive a general relation between $f_{\rm R}$ and magnetizations to help the understanding of the mechanism, and clarify that the fluctuation of the transverse magnetization is a key ingredient for the resonance in all temperature regions.
