AN ELECTRON-PARAMAGNETIC-RESONANCE STUDY OF THE HEAVY-FERMION SYSTEM URU2SI2

Citation
R. Spitzfaden et al., AN ELECTRON-PARAMAGNETIC-RESONANCE STUDY OF THE HEAVY-FERMION SYSTEM URU2SI2, Journal of physics. Condensed matter, 8(16), 1996, pp. 2857-2863
Citations number
24
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
09538984
Volume
8
Issue
16
Year of publication
1996
Pages
2857 - 2863
Database
ISI
SICI code
0953-8984(1996)8:16<2857:AESOTH>2.0.ZU;2-D
Abstract
Gd EPR measurements on the heavy-fermion system URu2Si2 are reported. In agreement with NMR results, we observe a heavy-fermion behaviour fo r 20 K < T < 60 K and the opening of a spin gap below T-N = 17.5 K. Ou r data reveal an almost constant dynamical susceptibility for T-N < T < 40 K, followed by a Curie-Weiss-like decrease for higher temperature s. The temperature dependence of the magnetic relaxation rate is calcu lated and compared with that derived from neutron scattering experimen ts.