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EPR and magnetization studies on single crystals of a heterometallic (Cu and Cr) complex: zero-field splitting determination

机译:异金属(Cu 和Cr )配合物单晶的EPR和磁化研究:零场分裂测定

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摘要

Magnetic properties of single crystals of the heterometallic complex [Cu(bpy)3]2[Cr(C2O4)3]NO3 9H2O (bpy = 2, 2'-bipyridine)have been investigated. From the recorded EPR spectra, the spin-Hamiltonian parameters have been determined. The magnetization measurements have shown magnetic anisotropy at low temperatures, which has been analysed as a result of the zero-field splitting of the CrIII ion. By fitting the exactly derived magnetization expression to the measured magnetization data, the axial zero-field splitting parameter, D, has been calculated. Comparing to the EPR measurements, it has been confirmed that D can be determined from the measurements of the macroscopic magnetization on the single crystals.
机译:研究了杂金属配合物[Cu(bpy)3] 2 [Cr(C2O4)3] NO3 9H2O(bpy = 2,2'-bipyridine)的单晶的磁性。从记录的EPR光谱中,已经确定了自旋哈密顿参数。磁化强度测量表明在低温下具有磁各向异性,这是由于CrIII离子的零场分裂而引起的。通过将精确推导的磁化表达式拟合到测得的磁化数据,已计算出轴向零场分裂参数D。与EPR测量相比,已经证实可以从单晶的宏观磁化强度的测量中确定D。

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