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Journal Articles

Susceptibility inhomogeneity and non-Fermi liquid behavior in UCu$$_{5-x}$$Pt$$_x$$

MacLaughlin, D. E.*; Rose, M. S.*; Bernal, O. O.*; Heffner, R. H.; Nieuwenhuys, G. J.*; Chau, R.*; Maple, M. B.*

Physica B; Condensed Matter, 374-375, p.174 - 176, 2006/03

 Times Cited Count:0 Percentile:0(Physics, Condensed Matter)

Transverse-field $$mu$$SR shifts and relaxation rates have been measured in the non-Fermi liquid alloy system UCu$$_{5-x}$$Pt$$_x$$. At low temperatures the fractional spread in Knight shifts is 2 for x=1, but is only half this value for x=1.5 and 2.5. In a disorder-driven scenario where the NFL behavior is due to a broadly distributed characteristic energy E, our results indicate that $$delta$$E/E$$_{av}sim(delta$$K/K)$$_{Trightarrow 0}$$ is similar for UCu$$_{5-x}$$Pd$$_x$$. Our results correlate with the observed suppression of other NFL anomaliess.

Journal Articles

Effect of annealing on glassy dynamics and non-Fermi liquid behavior in UCu$$_4$$Pd

MacLaughlin, D. E.*; Rose, M. S.*; Anderson, J. E.*; Bernal, O. O.*; Heffner, R. H.; Nieuwenhuys, G. J.*; Baumbach, R. E.*; Butch, N. P.*; Maple, M. B.*

Physica B; Condensed Matter, 374-375, p.177 - 179, 2006/03

 Times Cited Count:1 Percentile:6.64(Physics, Condensed Matter)

Longitudinal-field $$mu$$SR experiments have been performed in unannealed and annealed samples of the heavy-fermion compound UCu$$_4$$Pd to study the effect of disorder on non-Fermi liquid behavior in this material. The observed scaling exponent independent of annealing. Annealed samples exhibited a reduction of the relaxation rate at low temperatures, indicating that annealing shifts fluctuation noise power to higher frequencies. There was no tendency of the inhomogeneous spread in rates to decrease with annealing. The correlation with residual resistivity previously observed for a number of NFL heavy-electron materials is also found in the present work.

Oral presentation

Magnetism in CeCo(In,Cd)$$_5$$ probed by $$mu$$SR

Oishi, Kazuki; Heffner, R. H.; MacDougall, G. J.*; Ito, Takashi; Higemoto, Wataru; Luke, G. M.*; Amato, A.*; Nieuwenhuys, G.*; Spehling, J.*; Klauss, H. H.*; et al.

no journal, , 

no abstracts in English

Oral presentation

Magnetism and superconductivity in CeCo(In,Cd)$$_5$$ probed by $$mu$$SR

Oishi, Kazuki; Heffner, R. H.; Spehling, J.*; MacDougall, G. J.*; Ito, Takashi; Higemoto, Wataru; Amato, A.*; Nieuwenhuys, G.*; Klauss, H. H.*; Luke, G. M.*; et al.

no journal, , 

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