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Author (up) Sereni, J.G.
Title Comparative study of magnetic phase diagrams of Ce compounds Type Journal Article
Year 1998 Publication Journal of the Physical Society of Japan Abbreviated Journal J. Phys. Soc. Japan
Volume 67 Issue 5 Pages 1767-1775
Keywords
Abstract Thermal properties of magnetically ordered Ce-lattice systems are compared in their crossover to the non-magnetic state, driven by alloying effects. The ordering temperature (T-ord=T-N or T-C) is found to go to zero continuously only in a few cases, while in others a discontinuity in its decrease is clearly observed. Coincidentally, the magnetic contribution to the specific heat (C-p), the entropy and the free energy variations with temperature mark an evident difference between those cases. Furthermore, the extension of the non-fermi-liquid (NFL) phase in terms of concentration variation correlates with differences observed in the respective ordered phase. A systematic transformation from a mean field like transition to a fluctuation dominated type is observed in C-p(T), as the system overcomes a characteristic crossover concentration. Such a concentration appears as a limit for the NFL behavior in the paramagnetic phase above T-ord. A possible origin of the mentioned differences are discussed in terms of some alternatives in the evolution of the magnetic moments and the strength of their interactions.
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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0031-9015 ISBN Medium
Area Expedition Conference
Notes ISI:000073878900044 Approved no
Call Number BT @ hernan @ Serial 87
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