掺杂/spl β /-FeSi2过渡金属的四极分裂分析

S. Kondo, M. Hasaka, T. Morimura
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引用次数: 0

摘要

与其他过渡金属掺杂样品相比,在Co掺杂样品中观察到较大的四极分裂(Q.S.),而异构体位移(I.S.)没有显示出大的值。由于q.s与铁原子原子核处的电场梯度有关;假设la -声子传导电子之间存在相互作用,我们计算了原子核位置的电势。通过计算发现,电场梯度随着附着在传导电子上的声子数的增加而增大(=)。因此,与其他过渡金属掺杂样品相比,认为Co掺杂样品的q.s较大。
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Analysis of quadrupole splitting of transition metal doped /spl beta/-FeSi2
Large quadrupole splittings (Q.S.) are observed in Co doped specimen, compared with other transition metal doped specimens while isomer shifts (I.S.) do not show large value. Since Q.S. is associated with the electric field gradient at nucleus of iron atom; we calculate the potential at nucleus site, assuming the interaction between LA-phonon-conduction electron. Through the calculations, it is found that electric field gradient increase with the number of phonons attached to a conduction electron (=). Accordingly large Q.S. for Co doped specimen are considered to be due to large in comparison with those for other transition metal doped specimen.
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