1975
DOI: 10.1103/physrevlett.34.1019
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Specific Heat of the Spin-Fluctuation System UAl2

Abstract: We report measurements of the specific heat of paramagnetic UA1 2 between 0.8 and 25 K in magnetic fields up to 43 kOe. A nearly field-independent T 3 lnT term dominates the temperature region below 10 K. The susceptibility was measured between 3 and 10 K and varies as 1-AT 2 . These results, and earlier resistivity measurements, are consistent with the predictions of the spin-fluctuation model. This is the first unambiguous observation of the specific heat predicted by the spin-fluctuation model for an atomic… Show more

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Cited by 182 publications
(43 citation statements)
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(8 reference statements)
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“…The low temperature upturn below 15 K may be attributed to the Cr impurities 31 . Treated as a diluted spin system, we may fit the low-temperature data with the spin-fluctuation theory as follows 34,35 ,…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The low temperature upturn below 15 K may be attributed to the Cr impurities 31 . Treated as a diluted spin system, we may fit the low-temperature data with the spin-fluctuation theory as follows 34,35 ,…”
Section: Resultsmentioning
confidence: 99%
“…While the decrease of γ n at in the underdoped regime seems to be related to the Fermi surfaces reconstruction due to the presence of AF order 7 , the weakening of electronic correlation with Ni doping may cause the reduction of γ n in the overdoped regime 41 . The spinfluctuation contribution to the mass enhancement is 1 + 9 2 ln(S/3) 34 , which gives value of the Stoner exchangeenhancement factor S between 3.7 to 4.7 around optimal doping level. It should be noted that the above analysis may be too simplified considering the multi-band and correlated nature of iron-based superconductors.…”
Section: Discussionmentioning
confidence: 99%
“…La 3 Rh 4 Sn 13 superconducts below a critical temperature T c = 2.6 K. Moreover, the magnetic susceptibility, measured between T c and 300 K in a magnetic field of 0.1 T, obeys a T 2 -dependence very well, indicating the presence of ferromagnetic spin-fluctuations (as presented in panel (b)). A spin fluctuation characteristic temperature T SF ∼ 1090 K is estimated by analyzing the data with the spin-fluctuation model 27 Figs. 6-8 compare the low-temperature specific heat of Ce 3 Rh 4 Sn 13 and Ce 3 Co 4 Sn 13 .…”
Section: Resultsmentioning
confidence: 99%
“…It is hoped that some kind of Fermi liquid description will apply to the heavy fermion state at low enough temperature. This regime is probably reached in the case of the spin-fluctuators UA12 [6] and UPt 3 [7] near 1 K where the temperature variation of the electrical resistivity is approaching T 2 as expected for a Fermi liquid ( fig. 4) [8].…”
Section: General Propertiesmentioning
confidence: 99%