一维铁磁体的动态磁对密度函数
Dynamic Magnetic Pair-Density Function of a One-Dimensional Ferromagnet
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中文总结 AI 辅助
该研究推导了一维海森堡铁磁体的动态磁对密度函数（DymPDF），与SpinW模拟结果吻合，明确其在磁子模式转变处变号，为研究磁性材料局域自旋动力学提供了理论基础。
中文摘要 AI 辅助
动态磁对密度函数（DymPDF）$D_{\ m M}(r, E)$是通过将静态磁对分布函数（mPDF）扩展到有限能量转移推导得到的。从磁子色散关系中获得了一维海森堡铁磁体的解析DymPDF，并与使用{\textsc SpinW}开展的模拟结果进行了对比。近邻自旋对关联的能量依赖关系呈现出极好的一致性，这表明DymPDF在磁子模式转变处会改变符号，该转变发生在最大磁子能量的二分之一处。通过包含有限仪器分辨率、磁关联长度和傅里叶终止效应的模型，还重现了低能下的实空间DymPDF。这些结果为DymPDF分析提供了理论基础，可用于研究磁性材料中的局域自旋动力学。
英文摘要
The dynamic magnetic pair-density function (DymPDF) $D_{\rm M}(r, E)$ is derived by extending the static magnetic pair distribution function (mPDF) to finite energy transfer. The analytical DymPDF of a one-dimensional Heisenberg ferromagnet is obtained from the magnon dispersion and compared with simulations performed using {\textsc SpinW}. Excellent agreement is achieved for energy dependence of the nearest-neighbor spin-pair correlation, demonstrating that the DymPDF changes sign at the magnon-mode transition occurring at one-half of the maximum magnon energy. The real-space DymPDF at low energy is also reproduced with a model including finite instrumental resolution, magnetic correlation length, and Fourier-termination effects. These results establish the theoretical foundation of DymPDF analysis for investigating local spin dynamics in magnetic materials.
发表机构
- Quantum Radiation Application Development Association (q-RADA)（量子辐射应用开发协会）
- School of Science and Technology, Meiji University（明治大学理工学部）
- Department of Physics, National Cheng Kung University（国立成功大学物理系）
机构由 AI 辅助整理，请以论文原文为准。
