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Journal Articles

NMR study for $$4f$$-localized ferromagnet CeRu$$_2$$Ga$$_2$$B

Sakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Baumbach, R. E.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

Physical Review B, 86(9), p.094402_1 - 094402_8, 2012/09

https://doi.org/10.1103/PhysRevB.86.094402
 Times Cited Count：11 Percentile：41.17(Materials Science, Multidisciplinary)

Nuclear magnetic resonance (NMR) studies using $$^{11}$$B and $$^{69,71}$$Ga have been performed on the tetragonal Ce-based ferromagnet CeRu$$_2$$Ga$$_2$$B. The Knight shifts for the nuclei show an Ising-type anisotropy along the $$c$$ axis, similar to results from the static susceptibility. From the Knight shift measurements, the hyperfine coupling constants have been determined. The anisotropy of the spin- lattice relaxation rates $$1/T_1$$ indicates that the anisotropy of spin fluctuations are also Ising-like along the $$c$$ axis. The localized character of the $$4f$$ electrons in this system is discussed.

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

https://doi.org/10.1016/j.physb.2005.11.046
 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

NMR study for ferromagnet CeRu$$_2$$Ga$$_2$$B

Sakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Baumbach, R. E.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

no journal, , 

Tetragonal CeRu$$_2$$Ga$$_2$$B has been recently found to be a ferromagnet with $$T_{rm c}=16.3$$ K. The static and dynamic magnetic anisotropy in this system has been investigated by means of $$^{69,71}$$Ga- and $$^{11}$$B-nuclear magnetic resonance (NMR).

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