Handbook on the Physics and Chemistry of Rare Earths. vol.33 by J.-C. G. Bunzli, K.A. Gschneidner

By J.-C. G. Bunzli, K.A. Gschneidner

This quantity of the instruction manual illustrates the wealthy number of themes lined by means of infrequent earth technology. 3 chapters are dedicated to the outline of strong nation compounds: skutterudites (Chapter 211), infrequent earth -antimony structures (Chapter 212), and infrequent earth-manganese perovskites (Chapter 214). different stories take care of strong kingdom homes: one contribution contains details on current thermodynamic facts of lanthanide trihalides (Chapter 213) whereas the opposite one describes optical homes of infrequent earth compounds stressed (Chapter 217). eventually, chapters concentrate on answer chemistry. The state-of-the-art in unraveling resolution constitution of lanthanide-containing coordination compounds through paramagnetic nuclear magnetic resonance is printed in bankruptcy 215. the opportunity of time-resolved, laser-induced emission spectroscopy for the research of lanthanide and actinide strategies is gifted and seriously mentioned in bankruptcy 216.

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Anorg. Allg. Chemie 626, 1112. , 1999. J. Alloys and Compounds 291, 66. , 2002. Phys. Rev. B 65, 041105(R). , 2001. J. Alloys and Compounds 323–324, 516. , 1998. Nature 395, 876. , 2000. J. Phys. Cond. Mater. 12, 7915. , 1999. Phys. Rev. B 60, 13253. , 2001. J. Phys. Cond. Mater. 13, L45. , 1999. Solid State Commun. 109, 395. , 1999. Phys. Rev. B 60, 7410. , 1997. In: Physics Today, March Issue, pp. 42–47. , 1998. In: Solid State Physics, Vol. 51. Academic Press, San Diego, pp. 81–157 (Chapter 2).

The coupling between the lanthanide magnetic moments and the conduction electrons is large in these compounds. This large coupling results in unusual peaks in electrical transport data near the onset of magnetic ordering, and in some cases multiple magnetic transitions. Finally, the thermoelectric figures of merit for the La, Ce and Yb filled skutterudites are among the highest values reported for any material at elevated temperatures (600–1000 K). It is hoped that this article has captured some of the excitement generated by the recent research on the lanthanide filled skutterudites.

The Seebeck coefficient is extremely large below 5 K reaching a maximum value of −130 µV/K at 4 K, which reflects an unusually sharp feature in the electronic density of states. The application of a magnetic field induces a transition to a heavy-fermion state (HFS) with a well-defined phase boundary as a function of magnetic field and temperature (figs. 12, 13). A metamagnetic phase transition (fig. , 2002). It is suggested that the quadrupolar degrees of freedom are essential for the formation of the heavy-fermion state in this material.

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