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>Interpretation of the optical absorption spectrum and of the paramagnetic susceptibility of neodymium Ahyphen;type sesquioxide
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Interpretation of the optical absorption spectrum and of the paramagnetic susceptibility of neodymium Ahyphen;type sesquioxide
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机译：Interpretation of the optical absorption spectrum and of the paramagnetic susceptibility of neodymium Ahyphen;type sesquioxide
Ahyphen;Nd2O3is a layer structure built on the (NdO)n+ncation. Data for the 4.2 K optical spectrum and the strongly anisotropic parallel and perpendicular paramagnetic susceptibilities between 4 and 1000 K measured on single crystals, are reproduced using a Hamiltonian, that involves 12 free atom parameters (three Racahrsquo;s parameters, the spinndash;orbit coupling constant, Treesrsquo; parameters agr; and bgr;, and Juddrsquo;s sixTkoperators) and sixC3vcrystal field parameters. The Hamiltonian operates on the 364 kets in 4f3, that is includingJmixing. 88 Stark levels (from 0 to 34 000 cmminus;1) were fitted to a mean square deviation of 17 cmminus;1. The crystal field parameters (Wybournersquo;s formalism) areB20=minus;836 cmminus;1,B40=634 cmminus;1,B43=minus;1606 cmminus;1,B60=752 cmminus;1,B63=237 cmminus;1,B66=672 cmminus;1. The spectrum is strongly displaced to the red with respect to Nd3+in LaCl3and this is due to a lowering of Slaterrsquo;s integralsF2andF4by 2percnt; to 3percnt;. TheF6integral is unchanged. The spinndash;orbit coupling constant is also lowered by 2percnt;. The interaction parameters are slightly affected.
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