Read e-book online Handbook on the Physics and Chemistry of Rare Earths PDF

By G.R. Choppin, K.A. Gschneidner, L. Eyring, G.H. Lander

ISBN-10: 0444820159

ISBN-13: 9780444820150

This is often the 3rd quantity of a three-volume set of reports dedicated to the interrelationships, similarities, adjustments and contrasts of the lanthanide and actinide sequence of components. It includes 5 chapters at the comparative physics and thermodynamics of the lanthanide and actinide fabrics. the 1st chapters are eager about neutron scattering reviews, whereas the subsequent are serious about actual estate experiences related to digital, thermal and magnetic behaviors. the ultimate bankruptcy covers the thermodynamic homes of steel systems.

The first bankruptcy compares the inelastic neutron scattering behaviours of the lanthanides and actinides. the subsequent bankruptcy concentrates on neutron scattering by way of heavy fermion unmarried cyrstal fabrics, together with steel and semiconducting antiferromagnets and approximately insulating paramagnets. bankruptcy 3, essentially the most huge and complete one within the whole sequence, experiences intermediate valence and heavy fermions in a wide selection of lanthanide and actinide compounds, starting from steel to insulating fabrics. bankruptcy 5 specializes in matters at the excessive strain behaviors of anomalous cerium, ytterbium and uranium compounds. the ultimate bankruptcy is an intensive overview of the thermodynamic houses of lanthanide and actinide steel platforms.

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Extra info for Handbook on the Physics and Chemistry of Rare Earths

Example text

4 o~, P WAVE VFICTOR the field may then be removed stays in a single-domain L Fig. 22. Dispersion curve for UTe along the qz (parallel to the moment) and qx (perpendicular to the moment) directions at 5 K. The narrow hatched area shows the optic-phonon frequency. The different symbols correspond to different spectrometer conditions. The wide hatched area on the left-hand side corresponds to the region where the specific peak positions are uncertain. (From Lander et at. ) a n d , p r o v i d e d t h e s a m p l e is n o t w a r m e d a b o v e T c , it s t a t e .

5 [qqq] Fig. 19. Experimentally observed dispersion curves for USb in the 3k type-I structure at 10K. The solid lines correspond to a model proposed by HSlg and Furrer (1986). ) work (Lander et al. 1979, Lander and Stifling 1980) showed that sharp excitations did exist in USb, but reported that they were predominantly longitudinal in nature. However, Jensen and Bak (1981) pointed out that if the structure was 3k, as suggested by uniaxial stress measurements (Rossat-Mignod et al. 1980) and the absence of a measurable lattice distortion (Knott et al.

1992) pointed out the increased difficulties anticipated in a 5f 3 system with respect to seeing transitions as compared to either actinide 5f 2 or lanthanide 4_f3 systems. These comparisons are illustrated in fig. 14. (a) shows that at Q ~ 8 A-1 the 5f 3 transition is weaker by almost an factor of two than that in 5t"2. Similarly, as shown in fig. 14b, the maximum (for Q > 0) in the scattering cross section for the 4f 3 analogue Nd 3+ is at a higher Q value than that for U3+; this is because the 4f wavefunctions are more localized than their 5f counterparts.

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Handbook on the Physics and Chemistry of Rare Earths by G.R. Choppin, K.A. Gschneidner, L. Eyring, G.H. Lander


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