Spin fluctuation contributions to the specific heat of CuNi alloys

1983 ◽  
Vol 13 (7) ◽  
pp. 1519-1537 ◽  
Author(s):  
J W Loram ◽  
Z Chen
Keyword(s):  
Specific Heat ◽  
Spin Fluctuation

THE COMBINED ANALYSIS OF SPECIFIC HEAT AND THERMAL EXPANSION OF Nd1−xLuxMn2 COMPOUNDS

1993 ◽  
Vol 07 (01n03) ◽  
pp. 810-813
Author(s):  
N.H. KIM-NGAN ◽  
P.E. BROMMER ◽  
J.J.M. FRANSE
Keyword(s):  
Magnetic Properties ◽  
Thermal Expansion ◽  
Thermodynamic Properties ◽  
Specific Heat ◽  
Crystal Field ◽  
Spin Fluctuation ◽  
Spin Reorientation ◽  
Antiferromagnetic Order ◽  
Combined Analysis ◽  
Temperature Range

Specific heat and thermal expansion measurements have been performed on Nd1−xLUxMn2 in the temperature range between 1.5K and 300K. Below 10K, anomalies are observed which are ascribed to a spin reorientation of the Nd sublattice. These anomalies are only slightly affected by the substitution of Nd by Lu. Large effects, however, are observed on the magnetic properties of the Mn sublattice. The antiferromagnetic order disappears for x exceeding 0.30. The data are analysed in terms of Grüneisen parameters. In the paramagnetic compound LuMn2, a spin-fluctuation contribution to the thermodynamic properties is observed. In the Nd-containing compounds, distinct contributions from the crystal field acting on the Nd ions can be distinguished. The variation of the magnetic properties of the Mn sublattice with the concentration of Lu is discussed.

Specific Heat of the Spin-Fluctuation System UAl2

1975 ◽  
Vol 34 (16) ◽  
pp. 1019-1022 ◽  
Author(s):  
R. J. Trainor ◽  
M. B. Brodsky ◽  
H. V. Culbert
Keyword(s):  
Specific Heat ◽  
Spin Fluctuation

Spin-Fluctuation Contributions to the Specific Heat

1968 ◽  
Vol 169 (2) ◽  
pp. 417-431 ◽  
Author(s):  
W. F. Brinkman ◽  
S. Engelsberg
Keyword(s):  
Specific Heat ◽  
Spin Fluctuation

Spin fluctuation effects in the specific heat of CnNi alloys

Physica B+C ◽  
1981 ◽  
Vol 107 (1-3) ◽  
pp. 101-102 ◽  
Author(s):  
Chen Zhaojia ◽  
JW Loram
Keyword(s):  
Specific Heat ◽  
Spin Fluctuation ◽  
Fluctuation Effects

ANOMALIES IN SPECIFIC HEAT: THE INFLUENCE OF SPIN FLUCTUATIONS AND SUPERCONDUCTIVITY IN CUPRATES

2013 ◽  
Vol 27 (13) ◽  
pp. 1350089 ◽  
Author(s):  
K. L. MOHANTA ◽  
G. C. ROUT
Keyword(s):  
Specific Heat ◽  
Cuprate Superconductors ◽  
Spin Fluctuation ◽  
Mean Field ◽  
Microscopic Theory ◽  
Spin Fluctuations ◽  
Function Technique ◽  
Transverse Spin ◽  
Model Parameters ◽  
Superconducting Transition

We report here a microscopic theory of the temperature dependence of specific heat in high-Tc cuprate superconductors. The system is described by a model Hamiltonian consisting the antiferromagnetic spin fluctuations due to the impurity f-electrons as well as the conduction electrons, besides the superconducting interaction due to the itinerant electrons. The Hamiltonian is treated within a mean-field approach. The transverse spin fluctuation parameters and the superconducting gap are calculated by Zubarev's Green's function technique and solved self-consistently. The temperature dependent specific heat is calculated from the free energy in order to study the anomalies appearing at the spin fluctuation and superconducting transition temperatures. The evolutions of these anomalies are studied by varying the model parameters of the systems and results are discussed in reference to experimental observations.

On theT3lnTLaw in the Specific Heat of Spin-Fluctuation Compounds

1989 ◽  
Vol 58 (2) ◽  
pp. 360-363
Author(s):  
Holger Fehske ◽  
Dieter Ihle
Keyword(s):  
Specific Heat ◽  
Spin Fluctuation
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