1. Physikalisches Institut, Universität Stuttgart, D-70550 Stuttgart, Germany.
J Magn Reson. 2012 Oct;223:55-60. doi: 10.1016/j.jmr.2012.08.008. Epub 2012 Aug 21.
Single-crystal studies on anisotropic ESR-active materials can be conveniently carried out using torque-detected (TD) ESR, a novel technique which brings to ESR the sensitivity typical of torque magnetometry (TM). This method, which is easily operated in high magnetic fields and in a wide range of frequencies, was applied to investigate magnetic anisotropy in crystals of a tetrairon(III) single-molecule magnet with an S=5 ground state. TDESR was supported by TM measurements carried out in situ and provided an accurate estimate of the second-order axial anisotropy parameter D and of the longitudinal fourth-order contribution B(4)(0). The results were validated through a parallel angle-resolved investigation by traditional high-frequency ESR on the same material.
使用转矩探测（TD）电子顺磁共振（ESR）可以方便地对各向异性 ESR 活性材料进行单晶研究，这是一种新颖的技术，为 ESR 带来了典型的转矩磁强计（TM）灵敏度。这种方法在高磁场和宽频率范围内易于操作，应用于研究具有 S=5 基态的四铁（III）单分子磁体晶体中的磁各向异性。TDESR 得到了原位 TM 测量的支持，并提供了二阶轴向各向异性参数 D 和纵向四阶贡献 B(4)(0)的精确估计。通过对同一材料的传统高频 ESR 的平行角度分辨研究，验证了这些结果。
