Abstract

It is shown using Mössbauer spectroscopy on ⁶¹Cu(⁶¹Ni) isotopes that dielectric metal oxides of divalent copper exhibit combined quadrupole and Zeeman interaction of ⁶¹Ni nuclei with local fields in copper sites, whereas superconducting metal oxides exhibit only quadrupole interaction of ⁶¹Ni nuclei. The valence contributions to the electric field gradient tensor on ⁶¹Ni²⁺ and ⁶³Cu²⁺ nuclei are found to be identical for all metal oxides.

中文翻译：

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介电和超导铜金属氧化物在铜位点的超精细相互作用

摘要

使用Mössbauer光谱对⁶¹ Cu（⁶¹ Ni）同位素进行分析表明，二价铜的介电金属氧化物表现出⁶¹ Ni核与铜位局部场的组合四极和塞曼相互作用，而超导金属氧化物仅表现出⁶¹ Ni核的四极相互作用。。对于所有金属氧化物，发现⁶¹ Ni ²⁺和⁶³ Cu ²⁺原子核上的电场梯度张量的化合价均相同。