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P
Iwasa, Kazuaki*; Hao, L.*; Kogi, Masafumi*; Kuwahara, Keitaro*; Mignot, J.-M.*; Sugawara, Hitoshi*; Aoki, Yuji*; Matsuda, Tatsuma; Sato, Hideyuki*
Journal of the Physical Society of Japan, 81(9), p.094711_1 - 094711_9, 2012/09
Times Cited Count：9 Percentile：52.9(Physics, Multidisciplinary)SbKuwahara, Keitaro*; Iwasa, Kazuaki*; Kogi, Masafumi*; Kaneko, Koji; Metoki, Naoto; Raymond, S.*; M
asson, M.-A.*; Flouquet, J.*; Sugawara, Hitoshi*; Aoki, Yuji*; et al.
Physica B; Condensed Matter, 385-386(Part 1), p.82 - 84, 2006/11
Times Cited Count：3 Percentile：17.99(Physics, Condensed Matter)We report inelastic neutron scattering experiments performed to investigate the low energy magnetic excitations on single crystals of the heavy-fermion superconductor PrOsSb. The observed excitation clearly softens at a wave vector Q=(1,0,0), which is the same as the modulation vector of the field-induced antiferro-quadrupolar ordering, and its intensity at Q=(1,0,0) is smaller than that around the zone center. This result directly evidences that this excitonic behavior is derived mainly from nonmagnetic quadrupolar interactions. Furthermore, the narrowing of the linewidths of the excitations below the superconducting transition temperature indicates the close connection between the superconductivity and the excitons.
SbKaneko, Koji; Metoki, Naoto; Matsuda, Tatsuma; Kuwahara, Keitaro*; Kogi, Masafumi*; Shiina, Ryosuke*; Mignot, J.-M.*; Gukasov, A.*; Bernhoeft, N.*
Physica B; Condensed Matter, 378-380, p.189 - 191, 2006/05
Times Cited Count：1 Percentile：6.64(Physics, Condensed Matter)Neutron diffraction experiments under magnetic fields were carried out on the heavy fermion superconductor PrOsSb in order to reveal the origin of the field-induced ordered phase (FIOP) for 
[1,1,0]. The application of magnetic field induces the weak superlattice peaks with the ordering vector 
=(1,0,0) in FIOP, which is the same as for 
[0,0,1]. The observed superlattice reflections for [1,1,0] result from the antiferromagnetic component of 
+
; the induced tiny antiferromagnetic moments orient parallel to the applied field. This result cannot be explained by magnetic interactions and strongly evidences the underlying AFQ order with 
as a primary order parameter. These facts clarify the dominant role of -type antiferroquadrupolar interaction in PrOsSb.
Sb
Kuwahara, Keitaro*; Iwasa, Kazuaki*; Kogi, Masafumi*; Kaneko, Koji; Metoki, Naoto; Raymond, S.*; Masson, M.-A.*; Flouquet, J.*; Sugawara, Hitoshi*; Aoki, Yuji*; et al.
Physical Review Letters, 95(10), p.107003_1 - 107003_4, 2005/09
Times Cited Count：96 Percentile：92.15(Physics, Multidisciplinary)We report inelastic neutron scattering experiments performed to investigate the low energy magnetic excitations on single crystals of the heavy-fermion superconductor PrOsSb. The observed excitation clearly softens at a wave vector 
= (1,0,0), which is the same as the modulation vector of the field-induced antiferro-quadrupolar ordering, and its intensity at = (1,0,0) is smaller than that around the zone center. This result directly evidences that this excitonic behavior is derived mainly from nonmagnetic quadrupolar interactions. Furthermore, the narrowing of the linewidths of the excitations below the superconducting transition temperature indicates the close connection between the superconductivity and the excitons.
SbMetoki, Naoto; Kaneko, Koji; Araki, Shingo; Kogi, Masafumi*; Iwasa, Kazuaki*; Kuwahara, Keitaro*; Bernhoeft, N.*; Mignot, J.-M.*; Gukasov, A.*; Sato, Hideyuki*; et al.
Journal of Magnetism and Magnetic Materials, 272-276(Suppl.), p.e91 - e92, 2004/05
Times Cited Count：1 Percentile：7.12(Materials Science, Multidisciplinary)no abstracts in English
SbKogi, Masafumi*; Iwasa, Kazuaki*; Nakajima, Motoki*; Metoki, Naoto; Araki, Shingo; Bernhoeft, N.*; Mignot, J.-M.*; Gukasov, A.*; Sato, Hideyuki*; Aoki, Yuji*; et al.
Journal of the Physical Society of Japan, 72(5), p.1002 - 1005, 2003/05
Times Cited Count：199 Percentile：97.23(Physics, Multidisciplinary)no abstracts in English
Osakabe, Toyotaka; Kogi, Masafumi*; Iwasa, Kazuaki*; Kubota, M.*; Yoshizawa, Hideki*; Haga, Yoshinori; Suzuki, T.*
Physica B; Condensed Matter, 281-282, p.434 - 436, 2000/06
Times Cited Count：5 Percentile：32.8(Physics, Condensed Matter)no abstracts in English
Osakabe, Toyotaka; Kogi, M.*; Iwasa, Kazuaki*; *; J.M.Mignot*; I.N.Goncharenko*; *; *; Mori, Nobuo*; Haga, Yoshinori; et al.
Physica B; Condensed Matter, 230-232, p.645 - 648, 1997/00
Times Cited Count：17 Percentile：69.66(Physics, Condensed Matter)no abstracts in English
D
nni, A.*; Kitazawa, Hideaki*; Fischer, P.*; Tang, J.*; Kogi, M.*; Endo, Yasuo*; Morii, Yukio
Journal of Physics; Condensed Matter, 7, p.1663 - 1678, 1995/00
Times Cited Count：32 Percentile：83.46(Physics, Condensed Matter)no abstracts in English
Kudo, Kosei*; Kogi, Yuichiro*; Ignatenko, M.*; Ito, Naoki*; Mase, Atsushi*; Nagayama, Yoshio*; Yamaguchi, Soichiro*; Kawahata, Kazuo*; Sakata, Eiji*; Oyama, Naoyuki
no journal, ,
no abstracts in English
