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Kato, Harukazu; Sakai, Hironori; Kambe, Shinsaku; Walstedt, R. E.; Tokiwa, Yoshifumi; Onuki, Yoshichika
Acta Physica Polonica B, 34(2), p.1063 - 1066, 2003/09
We performed Ga-NMR/NQR studies for UPtGa
, which is a 5
-itinerant antiferromagnets with Neel temperature
= 26 K and an electronic specific coefficient
= 57 mJ/mol K
. From the NMR spectrum in the paramagnetic temperature region, the hyperfine coupling constants
in the paramagnetic state have been evaluated. The magnitude of the transferred field has been evaluated from the zero-applied-field spectrum, yielding a value for the hyperfine coupling constant
in the antiferromagnetic state. The estimated value of
is an order of magnitude larger than that of
. This implies the existence of a long-ranged hyperfine interaction path. The mechanism of the hyperfine interaction will be discussed in terms of RKKY interactions.
Kato, Harukazu; Sakai, Hironori; Tokunaga, Yo; Tokiwa, Yoshifumi; Ikeda, Shugo; Onuki, Yoshichika; Kambe, Shinsaku; Walstedt, R. E.
Journal of Physics; Condensed Matter, 15(28), p.S2001 - S2005, 2003/07
Times Cited Count:4 Percentile:26.37(Physics, Condensed Matter)UPtGa and UNiGa
are 5
-itinerant antiferromagnets with N
el temperature
= 26 K (Pt), 86 K (Ni). Remarkably, although the two compounds show almost identical Fermi surface properties in the paramagnetic state, recent neutron scattering experiments reveal that UPtGa
and UNiGa
are quite different in magnetic structure below
. In the microscopic viewpoint, we have carried out
Ga NMR/NQR measurements for the both coumpounds. We have suceeded in separating the temperature independent term and the Curie-like-temperature-dependent term of the Knight shift
. This should be a good starting point in considering the magnetism of this system.
Kaneko, Koji; Metoki, Naoto; Lander, G. H.*; Bernhoeft, N.*; Tokiwa, Yoshifumi; Haga, Yoshinori; Onuki, Yoshichika; Ishii, Yoshinobu
Physica B; Condensed Matter, 329-333(1-4), p.510 - 511, 2003/05
Times Cited Count:3 Percentile:20.85(Physics, Condensed Matter)no abstracts in English
Kato, Harukazu; Sakai, Hironori; Tokiwa, Yoshifumi; Kambe, Shinsaku; Walstedt, R. E.; Onuki, Yoshichika
Journal of Physics and Chemistry of Solids, 63(6-8), p.1197 - 1200, 2002/06
Times Cited Count:11 Percentile:49.99(Chemistry, Multidisciplinary)no abstracts in English