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• W2000853139 abstract "Specific heat C_{p}(T) measurements of the heavy fermion normal-spinel structure compound LiV_{2}O_{4} were carried out using a heat-pulse calorimeter over the temperature T range from 1.2 to 108 K. The electronic specific heat C_{e}(T) of LiV_{2}O_{4} is extracted from the C_{p}(T) data using the lattice contribution obtained for LiTi_{2}O_{4}, a superconductor with T_{c} = 11.8 K. The electronic specific heat coefficient gamma(T) = C_{e}(T)/T of LiV_{2}O_{4} is found to be 0.42 and 0.43 J/mol K^2 at T = 1 K for two different high magnetic purity samples, respectively. gamma(T) decreases rapidly with increasing temperature from 4 to 30 K and then decreases much more slowly from 0.13 J/mol K^2 at 30 K to 0.08 J/mol K^2 at 108 K. The C_{e}(T) is compared with theoretical predictions for the spin S = 1/2 Kondo model, a generic Fermi liquid model, and an antiferromagnetically coupled quantum-disordered metal. Each of these theories can adequately describe C_{e}(T) in the Fermi liquid regime at low (~ 1 to 10 K) temperatures, consistently yielding a large extrapolated gamma(0) = 428(3) mJ/mol K^2. However, none of these theories describes C_{e}(T) from ~ 10 K to 108 K. Our C_{e}(T) data are also in severe disagreement with the magnetic specific heat of the spin S = 1/2 Heisenberg model. Thermal expansion measurements of LiV_{2}O_{4} were carried out from 4.4 to 297 K using a differential capacitance dilatometer. Strong increases in the thermal expansion coefficient and Gruneisen parameter Gamma are found below ~ 20 K, confirming the results of Chmaissem et al. [Phys. Rev. Lett. 79, 4866 (1997)] obtained using neutron diffraction. We estimate that Gamma(0) is about 11.4." @default.
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• W2000853139 date "1999-01-15" @default.
• W2000853139 modified "2023-10-17" @default.
• W2000853139 title "Specific heat (1.2–108 K) and thermal expansion (4.4–297 K) measurements of the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mn>3</mml:mn><mml:mi>d</mml:mi></mml:math>heavy-fermion compound<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>LiV</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>O…" @default.
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• W2000853139 doi "https://doi.org/10.1103/physrevb.59.2627" @default.
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