Pressure dependence of the exchange anisotropy in an organic ferromagnet
Pressure dependence of the exchange anisotropy in an organic ferromagnet
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有机铁磁体中交换各向异性的压力依赖性
DOI：
10.1103/physrevb.91.014412
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发表时间：
2015
影响因子：
3.7
通讯作者：
S. Hill
中科院分区：
文献类型：
--
作者：
K. Thirunavukkuarasu;S. Winter;C. Beedle;A. Kovalev;R. T. Oakley;S. Hill
高压铁磁共振（FMR）和适用于计算分子材料中自旋轨道介导的各向异性交换相互作用的ab-initio方案的结合，为研究自旋轨道耦合（SOC）在se基有机铁磁中的作用提供了新的思路。FMR测量显示，随着压力的增加，磁性各向异性持续增加（高达2.2 GPa），这与基于已知结构压力依赖性的计算结果非常吻合。这种重原子有机铁磁网中各向异性交换项的大值强调了有机碳在广泛的有机物中的重要作用，而这种影响通常被认为是很小的。
The combination of high-pressure ferromagnetic resonance (FMR) and an ab-initio scheme suitable for calculation of spin-orbit mediated anisotropic exchange interactions in molecular materials provides insights into the role of spin-orbit coupling (SOC) in a Se-based organic ferromagnet. FMR measurements reveal a continuous increase in the magnetic anisotropy with increasing pressure (up to 2.2 GPa), in excellent agreement with calculations based on the known pressure-dependence of the structure. The large value of anisotropic exchange terms in this heavy atom organic ferromag-net emphasizes the important role of SOC in a wide range of organics where this effect is usually considered to be small.