Crystalline Electric Field and Structural Effects in by K. W. H. Stevens (auth.), Jack E. Crow, Robert P. Guertin,

By K. W. H. Stevens (auth.), Jack E. Crow, Robert P. Guertin, Ted W. Mihalisin (eds.)

Perhaps the name of this convention "Ctystalline electrical box and Structural results in f-Electron structures" displays most sensible the expansion and path of the sector. The name and the convention itself transcend "CEF" in extensive and significant respects. First, the inter-relations among CEF and mode softenings, distortions as a result of quadruplar ordering or the Jahn­ Teller influence, have received better concentration, for that reason the inclusion of . •• "Structral results. " moment, a lot larger emphasis at the actinides and, specifically, comparisons among actinides and the lighter infrequent earths is visible during this convention, consequently the extra common terminology . . . Iff-Electron platforms. " it sort of feels transparent that this comparability will result in an extension to the actinides of combined valence and Kondo issues, in addition to CEF results. The emergence of a broader self-discipline which include all f-electron platforms and that is excited by volatile, in addition to reliable, valence displays the maturation of the sector and a coming to grips with the complexity, in addition to the cohesion, of f-electron structures. This maturation is usually noticeable within the growing to be awareness of the consequences of CEF on shipping, thermodynamic houses, and superconductivity and its co-existence with magnetic order. This quantity includes sixty three articles, all yet of which have been provided on the convention held in Philadelphia, U. S. A. , on 12-15 November, 1979. approximately a hundred conferees from thirteen international locations attended the assembly which consisted of 4 complete days of lecture presentations.

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Kjems, B. LUthi, Z. Physik B (to be published). B. LUthi, Proc. of the Intern. Conference on Magnetism (1979), J. Magn. and Magn. Mat. (to be published). J. Birgeneau, E. P. Maita, L. C. Turberfield, Phys. Rev. B 8 : 5345 (1973). C. Turberfield, L. J. Birgeneau, E. Bucher, J. Appl. , 42 : 1746 (1971). P. E. D. Longinotti, E. Bucher, L. Kupferberg, S. Foner, Phys. Rev. B jg: 1005 (1975). P. W. A. Woolam, eds, Plenum Press, New York, 97 (1977). H. Bartholin, D. Florence, o. Vogt, J. Phys. Chem. : 89 (1978).

We have plotted p(T)/p(300K) for two cases. The curve labelled PSF is calculated under the assumption that exchange scattering from the rare earth ions is the dominant resistivity mechanism while the curve marked Pac is calculated for aspherical coulomb scattering. In both cases the curves were obtained using Hirst's single ion theory for the resistivi tyl3 with the appropriate scattering rates. 8 ,ll It is evident that the two mechanisms lead to rather different behavior at low temperatures. In Fig.

Huber, and B. LUthi, J. App1. Phys. 50, 1831 (1979). K. M. Leung and D. L. Huber, Phys. Rev. B 19, 5483 (1979). K. M. Leung and D. L. Huber, Phys. Rev. B 20, 1139 (1979). K. M. Leung, thesis, University of Wisconsin-Madison, 1979 (unpublished). J. R. Sandercock, S. B. Palmer, R. J. Elliott, W. Hayes, S. R. P. Smith, and A. P. Young, J. Phys. C 5, 3126 (1972); P. M. Levy, J. Phys. C 6, 3545 (1973); T. -Moran, R. L. Thomas, P. M. Levy, and H~ H. Chen, Phys. Rev. B 7, 3238 (1973). L. L. Hirst, Solid State Comm.

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