Magnetic Anisotropy Switch: Easy Axis to Easy Plane Conversion and Vice Versa
Magnetic Anisotropy Switch: Easy Axis to Easy Plane Conversion and Vice Versa
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DOI：
10.1002/adfm.201801846
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发表时间：
2018-08-08
影响因子：
19
通讯作者：
Bendix, Jesper
中科院分区：
文献类型：
--
作者：
Perfetti, Mauro;Sorensen, Mikkel A.;Bendix, Jesper
分子材料磁各向异性的合理设计是分子磁学研究的一个重要目标。事实上，分子纳米磁体的应用，如单分子磁体和分子磁制冷剂，取决于对这种性质的完全控制。轴向各向异性磁系统通常分为易轴或易平面，这取决于是否通过垂直于唯一轴或垂直于唯一轴施加磁场来获得最低能量。本文研究了三种稀土配合物的磁各向异性随磁场和温度的变化。据发现，对于这些类型的磁各向异性开关作为这些参数的函数。因此，本文通过实验证明，磁各向异性不是唯一定义的内在电子结构的系统中的问题，但也可以可逆地切换使用外部刺激：温度和磁场。
The rational design of the magnetic anisotropy of molecular materials constitutes a goal of primary importance in molecular magnetism. Indeed, the applications of molecular nanomagnets, such as single-molecule magnets and molecular magnetic refrigerants, depend on the full control over this property. Axially anisotropic magnetic systems are frequently classified as easy axis or easy plane, depending on whether the lowest energy is obtained by application of a magnetic field parallelly or perpendicularly to the unique axis. Here, the magnetic anisotropy of three lanthanide complexes is studied as a function of magnetic field and temperature. It is found that for two of these the type of magnetic anisotropy switches as a function of these parameters. Thus, this paper experimentally demonstrates that the magnetic anisotropy is not uniquely defined by the intrinsic electronic structure of the systems in question but can also be reversibly switched using external stimuli: temperature and magnetic field.