1997 Volume 66 Issue 10 Pages 2981-2984
UPd_2Al_3 is an itinerant antiferromagnet (TN = 14.3 K) coexisting with the superconducting state (Tc {--} 2 K). We have performed neutron inelastic scattering experiments at T = 10 and 20 K. The spectra have been found to be described in energy by a single Lorentzian function and analyzed on the basis of the so called self-consistent renormalization (SCR) theory. We determined the characteristic energy scale, T0 {--} 27 K, which represents the energy spread of the spin fluctuations. We have obtained the direct experimental evidence that the same proportionality relation between T0 and Tc holds in UPd_2Al_3 as observed in high-Tc cuprates, strongly suggesting that the superconductivity in UPd_2Al_3 is mediated by the spin fluctuations.
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Proceedings of the Physico-Mathematical Society of Japan. 3rd Series
Proceedings of the Tokyo Mathematico-Physical Society. 2nd Series
Tokyo Sugaku-Butsurigakukwai Kiji-Gaiyo
Tokyo Sugaku-Butsurigakkwai Hokoku
Tokyo Sugaku-Butsurigaku Kwai Kiji
