Why the iron magnetization in Gd2Fe14B and the spontaneous magnetization of Y2Fe14B depend on temperature differently
Why the iron magnetization in Gd2Fe14B and the spontaneous magnetization of Y2Fe14B depend on temperature differently
复制标题
为什么Gd2Fe14B中的铁磁化强度和Y2Fe14B的自发磁化强度对温度的依赖性不同
DOI：
10.1063/1.3443576
复制
发表时间：
2010
影响因子：
3.2
通讯作者：
V. Skumryev
中科院分区：
文献类型：
--
作者：
M. Kuz’min;D. Givord;V. Skumryev
结果表明，Gd_2Fe_（14）B铁亚晶格磁化强度的温度依赖性受Gd-Fe交换作用的影响显著。这与通常认为富铁稀土金属间化合物中的MFe（T）主要由Fe-Fe交换决定的看法不同。这种现象进行了讨论，考虑修改的低能量自旋波谱的Gd 2Fe 14 B，相比，Y 2Fe 14 B，在Gd-Fe相互作用的影响下。该结果对于评估铁或钴化合物与各向异性稀土（例如，Nd 2Fe 14 B），并进而，这种化合物的硬磁性能。
It is demonstrated that the temperature dependence of the iron sublattice magnetization in Gd2Fe14B is affected significantly by the Gd–Fe exchange interaction. This is at variance with the common perception that MFe(T) in iron-rich rare-earth intermetallics is determined predominantly by the Fe–Fe exchange. This phenomenon is discussed by considering the modification of the low-energy spin-wave spectrum of Gd2Fe14B, as compared to that of Y2Fe14B, under the influence of the Gd–Fe interaction. The result is of particular significance for evaluating the temperature dependence of the magnetocrystalline anisotropy of iron or cobalt compounds with anisotropic rare earths (e.g., Nd2Fe14B) and in turn, of the hard magnetic properties of such compounds.