Lanthanides/Actinides: Physics - II, Volume Volume 19 by G.R. Choppin, K.A. Gschneidner, L. Eyring, G.H. Lander

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

This is often the 3rd quantity of a three-volume set of stories dedicated to the interrelationships, similarities, changes and contrasts of the lanthanide and actinide sequence of parts. It contains 5 chapters at the comparative physics and thermodynamics of the lanthanide and actinide fabrics. the 1st chapters are considering neutron scattering reviews, whereas the subsequent are desirous about actual estate experiences regarding digital, thermal and magnetic behaviors. the ultimate bankruptcy covers the thermodynamic houses of steel systems.

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

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Extra info for Lanthanides/Actinides: Physics - II, Volume Volume 19 (Handbook on the Physics and Chemistry of Rare Earths)

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21) that it is even difficult to define EA. UTe was also examined at Chalk River (Buyers et al. 4meV Away from this point the situation was unclear. Some of these ambiguities were resolved by Lander et al. (1991b) by working on a single-domain sample. This latter state is produced simply by cooling in a modest (1 < H < 4 k O e ) magnetic field; 38 E. H. 2 --' 12o io.. 0 °~ ::k J US Ooo ° ~ t . , ~--x Z >- o---LORENTZIAN FIT • 0 { 4 2 , • , , t 6 8 I0 12 , 14 0,0 ~ 16 FREQUENCY ( T H z ) , , l0 9 , i , -i , S~q + SYq~ 4~ UTe 8 ' ' Sxq + ' sYct,' 10 / ' -tD Field Cooled i~ l{ [,11] T=SK • 7 / t~/ 8 7 ~z v 6 • /( 5 4 • ~•.

One would have expected TN ~ 160K (fig. 75 TN. There has been some indication from muon spectroscopy (Aseh et al. 1990) that some "transition" occurs in USb around 150K, but the exact nature is still elusive. Single crystals of UP or UBi of sufficient size for neutron inelastic scattering have not been grown. 2. Uranium ferromagnets Single crystals of the monochalcogenides US, USe and UTe were all examined by the group at Chalk River National Laboratory in Canada, and much of this is reviewed by Buyers and Holden (1985).

The latter, of course, is a reflection of the stronger exchange and ordering temperature in USb (TN = 213 K) as compared to CeAs (TN = 8 K). H/ilg and Furrer (1986) have fit the USb excitation spectrum with a model including strong higher-order magnetic interactions. Whereas this model is useful at low temperatures, it is difficult to see how it can explain some of the temperature dependent effects even in USb (see below) or the broad featureless spectrum found in UN or UAs. More recently, USb has been re-examined by Hagen et al.

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