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Hotta, Takashi; Dagotto, E.*
Physica B; Condensed Matter, 312-313(1-4), p.700 - 702, 2002/03
Times Cited Count:2 Percentile:14.17(Physics, Condensed Matter)The crucial role of the orbital degree of freedom is here discussed in order to understand the complex spin and charge structures of transition metal oxides. For manganites, it is shown that diagonal charge stripes in the ferromagnetic phase are induced by the staggered orbital ordered pattern, while for ruthenates, a novel orbital ordering is found to exist in the G-type antiferromagnetic structure, with a hole arrangement as recently observed in X-ray experiments.
Maehira, Takahiro; Higashitani, Atsushi*; Higuchi, Masahiko*; Yasuhara, Hiroshi*; Hasegawa, Akira*
Physica B; Condensed Matter, 312-313(1-4), p.103 - 105, 2002/03
Times Cited Count:12 Percentile:52.54(Physics, Condensed Matter)UBe is a typical heavy-fermion superconductor compound. The lowtemperature electronic specific heat coefficient has the anomalous large value,
=1.1J/K
mol, which is the largest among the heavy fermion uranium compounds. It also becomes the superconductor below T
=0.85K. Therefore, UBe
is an important material as a strongly correlated electron system, and it is necessary to study from both sides of the theory and the experiment. The measurement suggests that the Fermi surface of UBe
may consist of small sheets. The energy band structure and the Fermi surface for UBe
are calculated by the relativistic linear APW method.
Kambe, Shinsaku; Kato, Harukazu; Sakai, Hironori; Walstedt, R. E.; Haga, Yoshinori; Aoki, Dai*; Onuki, Yoshichika*
Physica B; Condensed Matter, 312-313, p.902 - 903, 2002/03
Times Cited Count:6 Percentile:34.34(Physics, Condensed Matter)We have measuered NMR in the paramagnetic and antiferromagnetic states of UGa in order to discuss the spin structure in the antiferromagnetic state.
Matsuda, Tatsuma; Abe, Keisuke*; Watanuki Fumihito*; Sugawara, Hitoshi*; Aoki, Yuji*; Sato, Hideyuki*; Inada, Yoshihiko*; Settai, Rikio*; Onuki, Yoshichika
Physica B; Condensed Matter, 312-313, p.832 - 833, 2002/03
Times Cited Count:20 Percentile:66.51(Physics, Condensed Matter)The angular dependence of de Haas-van Alphen effect has been measured to reveal the electronic structure of filled skutterudite PrRuSb
. The angular dependence of de Haas-van Alphen frequency of PrRu
Sb
is in good agreement with that of LaRu
Sb
. Compared with PrFe
P
, no anomalous enhancement of cyclotron effective mass has been observed in this system. This change of electronic structure is attributed to the difference in the
hybridization strength, which is expected from the large difference in the lattice parameters.
Tateiwa, Naoyuki*; Metoki, Naoto; Koike, Yoshihiro; Oikawa, Kenichi*; Kimura, Noriaki*; Aoki, Haruyoshi*; Komatsubara, Takemi*
Physica B; Condensed Matter, 312-313, p.891 - 893, 2002/03
Times Cited Count:0 Percentile:0.00(Physics, Condensed Matter)no abstracts in English
Yamamoto, Etsuji; Haga, Yoshinori; Shishido, Hiroaki*; Nakawaki, Hirokazu*; Inada, Yoshihiko*; Settai, Rikio*; Onuki, Yoshichika
Physica B; Condensed Matter, 312-313, p.302 - 303, 2002/03
Times Cited Count:16 Percentile:60.51(Physics, Condensed Matter)We have succeeded in growing a high-quality single crystal of UIr with the monoclinic structure by the Czochralski pulling method in a tetra-arc furnace. UIr is a ferromagnetic compound. Its Curie temperature is 46 K and the magnetic moment is found to be oriented along the [1 0
/U. We have observed the de Haas-van Alphen (dHvA) oscillation. All the detected branches have heavy cyclotron effective masses ranging from 9.6 to 32
. They are consistent with the electronic specific heat coefficient
=48.5 mJ/K
mol.
Okane, Tetsuo; Fujimori, Shinichi; Ino, Akihiro*; Fujimori, Atsushi*; Dhar, S. K.*; Mitra, C.*; Manfrinetti, P.*; Palenzona, A.*
Physica B; Condensed Matter, 312-313, p.349 - 351, 2002/00
Times Cited Count:0 Percentile:0.00(Physics, Condensed Matter)no abstracts in English