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EnglishIn this report, we present and discuss new results for NQR and muSR experiments in CeCu6-xAux, for x=0.3 (Neel temperature TN about 0.5 K) and x = 0.8 (TN about 1.8 K), carried out as part of our study of the spin dynamics, the magnetic ground-state and precursor effects on approaching TN. In these compounds the NQR relaxation rate for T>>TK (the Kondo temperature) is consistent with a relaxation process driven by screened local Ce moments with a weak temperature and x dependence on cooling. The low temperature effective screening increases with decreasing x. The low-temperature zero-field muSR reveals an enhanced relaxation rate that does not appear to follow a critical law, as expected on approaching the ordering temperature.
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http://hdl.handle.net/11571/24013| Titolo: | From weakly antiferromagnetic metal to quantum criticality: NQR and mu SR results for CeCu6-xAux with 0<=x<=0.8 |
| Autori interni: | PAPINUTTO, NICO DARIO CARRETTA, PIETRO RIGAMONTI, ATTILIO |
| Data di pubblicazione: | 2005 |
| Rivista: | PHYSICA. B, CONDENSED MATTER |
| Abstract: | In this report, we present and discuss new results for NQR and muSR experiments in CeCu6-xAux, for x=0.3 (Neel temperature TN about 0.5 K) and x = 0.8 (TN about 1.8 K), carried out as part of our study of the spin dynamics, the magnetic ground-state and precursor effects on approaching TN. In these compounds the NQR relaxation rate for T>>TK (the Kondo temperature) is consistent with a relaxation process driven by screened local Ce moments with a weak temperature and x dependence on cooling. The low temperature effective screening increases with decreasing x. The low-temperature zero-field muSR reveals an enhanced relaxation rate that does not appear to follow a critical law, as expected on approaching the ordering temperature. |
| Handle: | http://hdl.handle.net/11571/24013 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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