Compendium on

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Compendium on Thermal and Magnetic properties
of Ce -based alloys compounds Julián G.
Sereni  Laboratorio Bajas Temperaturas, Centro
Atómico Bariloche (CNEA) CONICET, RA-8400 San
Carlos de Bariloche, Argentina
Keywords Cerium lattice , Kondo effect , Heavy
Fermion , Non Fermi Liquid behavior , Quantum
Critical Points , Quantum Criticallity , Specific
heat, Entropy
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1a. Cerium as single ion Electronic structure
4f orbital binding energy, scales of energy Ce
metallic radius Possible metallic
configurations Interaction with the structure
Crystal Field Effect, and with the band Kondo
effect Hybridization Exchange mechanisms
control parameters doping pressure 1b. From
Magnetic order to Valence Instablility (Ce
lattice) Magnetic Phase Diagrams of Ce lattices
Long Range Magn. Order?Magnetic Instabilities
(Non-Fermi liquid NFL) ?Valence Instability
(Fermi liquid FL). Onset of charge
fluctuations, residual resistivity, comparison of
different critical concentrations 2. Magnetic
Instabilities and Non-Fermi-liquid behavior Types
of Phase Boundaries a) Weak dependence on
control parameters Type III behavior b)
Evanescence of magnetic order at finite
temperature Type II behavior (unconventional
superconductors) 3. Pre- quantum critical region
in Ce doped systems a) Pre-critical region in Ce
doped systems Experimental criteria for QCP
candidates Type I behavior. NFL behavior in
the pre-critical region AF and Ferro- exemplary
systems. Role of disorder. b) Approaching the
QCP. Local vs. SDW model predictions. 4. Quantum
Critical Points (QCP) (under construction)
QCP related effects in thermal , magnetic and
transport properties
Index
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Española de Física 13 (1999) 25-31. Evanescence
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331.. Compendium of Thermal Magnetic
properties of Ce alloys compounds see
http//cabbat1.cnea.gov.ar/?jsereni/