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首页> 外文期刊>Canadian Journal of Physics >Neutron scattering study of the classical antiferromagnet MnF_2: A perfect hands-on neutron scattering teaching course
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Neutron scattering study of the classical antiferromagnet MnF_2: A perfect hands-on neutron scattering teaching course

机译：经典反铁磁体MnF_2的中子散射研究：完美的动手中子散射教学课程

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摘要

We present the classical antiferromagnet MnF_2 as a perfect demonstration system for teaching a remarkably wide variety of neutron scattering concepts. The nature of antiferromagnetism and the magnetic Hamiltonian in this classical antiferromagnet are discussed. The transition temperature to the Neel state, the value of magnetic moment in the ordered state, the critical scattering close to the phase transition, spin waves associated with the ordering of the moments, as well as their dispersion and temperature dependences are determined experimentally. Parameters such as the Neel transition temperature and exchange coupling constants obtained from the experiments agree reasonably well with the previously published data. In addition, details of how an inelastic neutron scattering experiment is performed by means of triple-axis spectroscopy are provided.
机译：我们提出了经典的反铁磁体MnF_2作为一个完美的演示系统，用于教授种类繁多的中子散射概念。讨论了该经典反铁磁体中反铁磁性的性质和磁性哈密顿量。实验确定了向Neel态的转变温度，有序态的磁矩值，接近相变的临界散射，与矩序相关的自旋波及其色散和温度依赖性。从实验中获得的诸如Neel转变温度和交换耦合常数的参数与先前公开的数据相当吻合。另外，提供了关于如何通过三轴光谱学进行非弹性中子散射实验的细节。

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