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Thermodynamics of CeNiSn at low temperatures and in weak magnetic fields | K. A. Kikoin
; M. N. Kiselev
; A. S. Mishchenko
; A. de Visser
; | Date: |
14 Mar 1999 | Journal: | Phys. Rev. B, vol. 59, p. 15070 | Subject: | Strongly Correlated Electrons | cond-mat.str-el | Affiliation: | 2,3), A. S. Mishchenko , A. de Visser ( Ben-Gurion University of the Negev, Beer-Sheva, Israel, Russian Research Center "Kurchatov Institute", Moscow, Russia, Laboratoire Leon Brillouin, CE-Saclay Gif-sur-Yvette, France, Van der Waals-Ze | Abstract: | Detailed experimental and theoretical studies of the low-temperature specific heat, magnetic susceptibility, thermal expansion and magnetostriction of the orthorhombic compound CeNiSn are presented. All anomalies observed in the thermodynamic and magnetic properties of CeNiSn are explained in a framework of a model of metallic Kondo lattice with well developed spin-liquid-type excitations. The pseudogap behavior of these excitations appears due to interplay between spin-fermions and soft crystal-field (CF) states. The thermodynamic relations for the spin liquid are derived. Together with the explanation of inelastic neutron scattering spectra given earlier within a same approach these studies of the low-temperature thermodynamics and magnetic response give a consistent description of the nature of anomalies in the low-temperature thermodynamics of perfect and imperfect CeNiSn crystals. | Source: | arXiv, cond-mat/9903218 | Services: | Forum | Review | PDF | Favorites |
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