Artículo
Entropy Constraints in the Ground State Formation of Magnetically Frustrated Systems: Role of Nernst Postulate in Real Systems
Fecha de publicación:
01/2018
Editorial:
Springer/Plenum Publisher
Revista:
Journal of Low Temperature Physics
ISSN:
0022-2291
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A systematic modification of the entropy trajectory (Sm(T)) is observed at very low temperature in magnetically frustrated systems as a consequence of the constraint (Sm≥ 0) imposed by the Nernst postulate. The lack of magnetic order allows to explore and compare new thermodynamic properties by tracing the specific heat (Cm) behavior down to the sub-Kelvin range. Some of the most relevant findings are: (i) a common Cm/ T| T → 0≈ 7 J/mol K2 ‘plateau’ in at least five Yb-based very-heavy-fermions (VHF) compounds; (ii) quantitative and qualitative differences between VHF and standard non-Fermi-liquids; (iii) entropy bottlenecks governing the change of Sm(T) trajectories in a continuous transition into alternative ground states. A comparative analysis of Sm(T→ 0) dependencies is performed in compounds suitable for adiabatic demagnetization processes according to their ∂2Sm/ ∂T2 derivatives.
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Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Citación
Sereni, Julian Gustavo Renzo; Entropy Constraints in the Ground State Formation of Magnetically Frustrated Systems: Role of Nernst Postulate in Real Systems; Springer/Plenum Publisher; Journal of Low Temperature Physics; 190; 1-19; 1-2018
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