Origin of the F19 hyperfine structure in transition element fluorides
Origin of the F19 hyperfine structure in transition element fluorides
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过渡元素氟化物中F19超精细结构的起源
DOI：
10.1103/physrevlett.6.343
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发表时间：
1961
期刊：
影响因子：
--
通讯作者：
R. E. Watson
中科院分区：
文献类型：
--
作者：
A. Freeman;R. E. Watson
已经发现存在于正常抗磁性离子（如F）核中的大内部磁场被解释为来自氟离子轨道中未成对电子自旋的干扰。由于不成对的起源在于这些电子与铁系原子的Sd磁电子的相互作用，实验结果表明，这些实验提供了有关磁电子分布的有价值的信息，大大增加了我们对这些材料行为的理解。简要地说，对HFS观测的理论解释遵循几种不同的模型，它们把不成对描述为（1）共价键混合成纯离子构型'~'的结果（即，金属离子3D波函数已经被少量适当对称的氟函数增强），或（2）泡利原理（对全离子构型）的解配对作用，其影响与阳离子3d轨道具有相同自旋的氟离子轨道不同于具有相反自旋的氟离子轨道。
The large internal magnetic fields that have been found to exist at the nucleus of normally diamagnetic ions, like F, have been interpreted as arisingfrom unpaired electron spins in the fluoride ion orbitals. Since the origin of the unpairing lies in the interaction of theseelectrons with the Sd magnetic electrons of the iron series atoms, the experiments have been shown to yield valuable information about the distribu-tion of the magnetic electrons and have greatly increased our understanding of the behavior of these materials. Very briefly, the theoretical interpretations of the hfs observations have fol-lowed several distinct models which describe the unpairing as being the result of (1) an ad-mixture of covalent bonding into the purely ionic configuration'~'(ie, the metal ion 3d wave functions have been augmented by small amounts of fluorine functions of the proper symmetry), or (2) the unpairing action of the Pauli principle (on the wholly ionic configuration) which affects those fluoride orbitals which have the same spin as the cation 3d orbital differently from those orbitals which have opposite spin.