论文标题
dzyaloshinskii-moriya互动中的nd $ _ {2} $ fe $ _ {14} $ b作为旋转重新定向和旋转磁环效应的起源
Dzyaloshinskii-Moriya interaction in Nd$_{2}$Fe$_{14}$B as the origin of spin reorientation and rotating magnetocaloric effect
论文作者
论文摘要
通过组合第一个原理计算和蒙特卡洛模拟，研究了ND $ _ {2} $ fe $ _ {14} $ b的自旋重新定位的机制，它是众所周知的neododim permanent磁铁的宿主晶体。旋转的重新定位被认为是从晶体场效应中得出的，并且由于硬磁铁应用的不良属性而受到较少的关注。 dzyaloshinskii-moriya的相互作用通常在稀土大体系统中吸引人或经常被忽略，包括诸如ND $ _ {2} $ fe $ _ {14} $ B之类的永久磁铁，因为人们认为磁动率比Dzyaloshinskii-Moriya Itspetions更为主导。但是，在这项研究中，我们首次发现，nd $ _ {2} $ fe $ _ {14} $ b中的旋转重新定位归因于dzyaloshinskii-moriya互动。我们还发现，ND $ _ {2} $ fe $ _ {14} $ b中的自旋重新定位在实际应用级别上产生了旋转磁静电效应的绝佳阶段。我们发现，dzyaloshinskii-moriya相互作用肯定有助于物理特性，这是磁性材料中不可忽略的效果。
The mechanism of spin reorientation in Nd$_{2}$Fe$_{14}$B, which is a host crystal of a well-known neodymium permanent magnet, is studied by combining first-principles calculations and Monte Carlo simulations. The spin reorientation is thought to be derived from crystal field effects and gets less attention because of the undesirable property for hard magnet application. Dzyaloshinskii-Moriya interactions are usually less attractive or often ignored in rare-earth bulk systems, including permanent magnets such as Nd$_{2}$Fe$_{14}$B since people believe that the magnetic anisotropy is more dominant than the Dzyaloshinskii-Moriya interactions. However, in this study, we have found, for the first time, that the spin reorientation in Nd$_{2}$Fe$_{14}$B is attributed to Dzyaloshinskii-Moriya interactions. We have found, furthermore, the spin reorientation in Nd$_{2}$Fe$_{14}$B yields a great stage of rotating magnetocaloric effect at practical application level. We have found that the Dzyaloshinskii-Moriya interactions definitely contributes to the physical properties as a non-negligible effect in magnetic materials.
