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(As,P)Ishikado, Motoyuki; Kodama, Katsuaki; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Wakimoto, Shuichi; Iyo, Akira*; Eisaki, Hiroshi*; Arai, Masatoshi; Shamoto, Shinichi
Physica C, 471(21-22), p.643 - 646, 2011/11
Times Cited Count：4 Percentile：20.88(Physics, Applied)Superconducting gap symmetry of 
1111 system, which has the highest 
in iron-based superconductors, is considered to be full gap 
wave based on magnetic penetration depth and neutron scattering measurements. On the other hand, a line node gap symmetry is proposed in BaFe(As,P) based on magnetic penetration depth and thermal conductivity measurements despite comparatively its high- (=30 K). Inelastic neutron scattering of BaFe(As,P) may exhibit different magnetic excitations in the 
-position or 
-dependence of a resonant peak from that of La1111 system. In this study, we performed inelastic neutron scattering measurement on 36g polycrystalline powder sample of optimally-doped BaFe(As,P) using Fermi chopper spectrometer 4SEASONS in J-PARC. We will discuss about the possible superconducting gap symmetry based on our inelastic neutron scattering results.
Shirage, P. M.*; Miyazawa, Kiichi*; Ishikado, Motoyuki; Kiho, Kunihiro*; Lee, C.-H.*; Takeshita, Nao*; Matsuhata, Hirofumi*; Kumai, Reiji*; Tomioka, Yasuhide*; Ito, Toshimitsu*; et al.
Physica C, 469(9-12), p.355 - 369, 2009/06
Times Cited Count：40 Percentile：79.94(Physics, Applied)We have utilized a high-pressure (HP) technique to synthesize a series of newly-discovered iron (nickel)-based superconductors. The effect of (O)-deficiency, variation of ions, and the external pressure on 
are examined. All the experimental data indicate strong correlation between the crystal structure and the superconductivity of the oxypnictide superconductors. Upper critical field measurement on single crystalline sample of PrFeAsO
shows the superconducting anisotropy of 5, which is smaller than cuprates. We also demonstrate that HP technique is applicable for the so-called "122" systems.
(As,P)Ishikado, Motoyuki; Kodama, Katsuaki; Nakamura, Mitsutaka; Kajimoto, Ryoichi; Inamura, Yasuhiro; Wakimoto, Shuichi; Arai, Masatoshi; Iyo, Akira*; Eisaki, Hiroshi*; Shamoto, Shinichi
no journal, ,
Superconducting gap symmetry of 1111 system, which has the highest in iron-based superconductors, is considered to be full gap -wave based on magnetic penetration depth and neutron scattering measurements. On the other hand, a line node gap symmetry is proposed in BaFe(As,P) based on magnetic penetration depth and thermal conductivity measurements despite comparatively its high- (= 30K). Therefore, inelastic neutron scattering of BaFe(As,P) may exhibit different magnetic excitations in the -position or -dependence of a resonant peak from that of La1111 system. In this study, we performed inelastic neutron scattering measurement on 36g polycrystalline powder sample of optimally-doped BaFe(As,P) using Fermi chopper spectrometer 4SEASONS in J-PARC. We will discuss about the possible superconducting gap symmetry based on our inelastic neutron scattering results.
