掺锶稀土钴酸盐中的晶场相互作用和氧化学计量效应
Crystal-field interaction and oxygen stoichiometry effects in strontium-doped rare-earth cobaltates
摘要：
用非弹性中子散射方法研究了掺锶稀土化合物R（x）Sr（1-x）CoO（3-z）（R=Pr，Nd，Ho，Er）的晶场相互作用。特别强调的是，在这些化合物的合成中自然发生的缺氧的影响。所观察到的能谱被发现是在R站点的不同的最近邻氧协调的晶体场的叠加的结果。实验数据解释的晶体场参数的行为在一个一致的方式通过稀土系列，从而允许一个可靠的外推稀土离子在本工作中不考虑。
英文摘要：
Inelastic neutron scattering was employed to study the crystal-field interaction in the strontium-doped rare-earth compounds R(x)Sr(1-x)CoO(3-z) (R=Pr, Nd, Ho, and Er). Particular emphasis is laid on the effect of oxygen deficiencies which naturally occur in the synthesis of these compounds. The observed energy spectra are found to be the result of a superposition of crystal fields with different nearest-neighbor oxygen coordination at the R sites. The experimental data are interpreted in terms of crystal-field parameters which behave in a consistent manner through the rare-earth series, thereby allowing a reliable extrapolation for rare-earth ions not considered in the present work.
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