396 citations · 1.4k across the 23 of their papers we have counts for
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High transport Jc in magnetic fields up to 28 T of stainless steel/Ag double sheathed Ba122 tapes fabricated by scalable rolling process
Zhaoshun Gao, Kazumasa Togano, Akiyoshi Matsumoto +1
The recently discovered iron-based superconductors with very high upper critical field and small anisotropy have been regarded as a potential candidate material for high field appl…
Achievement of practical level critical current densities in PIT Ba1-xKxFe2As2/Ag tapes by conventional cold mechanical deformation
Zhaoshun Gao, Kazumasa Togano, Akiyoshi Matsumoto +1
We found that transport critical current density (Jc) of the Ba1-xKxFe2As2/Ag tapes is significantly enhanced by the combination process of cold flat rolling and uniaxial pressing.…
Large enhancement of transport critical current density of ex-situ PIT Ag/(Ba,K)Fe2As2 tapes achieved by applying cycles of cold deformation and heat treatment
Kazumasa Togano, Zhaoshun Gao, Akiyoshi Matsumoto adn Hiroaki Kumakura
We report that high transport critical current density exceeding 104 A/cm2 at 4.2 K and 10 T can be obtained with good reproducibility for Ag sheathed (Ba,K)Fe2As2 (Ba 122) tapes b…
Enhanced high-field transport critical current densities observed for the ex-situ PIT processed Ag/(Ba,K)Fe2As2 thin tapes
K. Togano, Z. S. Gao, H. Taira +6
We found that the transport Jc of the ex-situ PIT processed (Ba,K)Fe2As2 (Ba-122) wire with single Ag sheath can be significantly enhanced by repeating the combined process of roll…
Large Transport Critical Current Densities of Ag Sheathed (Ba,K)Fe2As2+Ag Superconducting Wires Fabricated by an ex-situ Powder-in-Tube (PIT) Process
Kazumasa Togano, Akiyoshi Matsumoto, Hiroaki Kumakura
We report large transport critical current densities observed in Ag-added (Ba,K)Fe2As2 superconducting wires prepared by an ex-situ powder-in-tube (PIT) process. The wire has a sim…
A New Noncentrosymmetric Superconducting Phase in the Li-Rh-B System
Hiroyuki Takeya, Hiroki Fujii, Mohammed ElMassalami +6
Superconductivity, at 2-3 K, was observed in a novel phase of the ternary Li-Rh-B system. The structural phase exhibits a large noncentrosymmetric cubic unit cell with the a-parame…
Fabrication of high performance MgB2 wires by an internal Mg diffusion process
J. M. Hur, K. Togano, A. Matsumoto +3
We succeeded in the fabrication of high-Jc MgB2/Fe wires applying the internal Mg diffusion (IMD) process with pure Mg core and SiC addition. A pure Mg rod with 2 mm diameter was p…
Muon spin rotation study of the ternary noncentrosymmetric superconductors LiPdPtB
Petra S. Häfliger, Rustem Khasanov, Rolf Lortz +5
We investigated the superconducting state of the noncentrosymmetric superconductors LiPdPtB with superconducting transition temperature = 5.16(8) K (=2.25),…
Landau and Ott scaling for the kinetic energy density and the low conventional superconductors, and Nb
Mauro M. Doria, S. Salem-Sugui, P. Badica +1
The scaling approach recently proposed by Landau and Ott for isothermal magnetization curves is extended to the average kinetic energy density of the condensate. Two low supe…
Muon-spin-rotation measurements of the penetration depth in Li_2Pd_3B
R. Khasanov, I. L. Landau, C. Baines +4
Measurements of the magnetic field penetration depth in the ternary boride superconductor LiPdB ( K) have been carried out by means of muon-spin rotation…
S-wave/spin-triplet order in superconductors without inversion symmetry: LiPdB and LiPtB
H. Q. Yuan, D. F. Agterberg, N. Hayashi +5
We investigate the order parameter of noncentrosymmetric superconductors LiPdB and LiPtB via the behavior of the penetration depth . The low-temperature penet…
A Penetration Depth Study on Li2Pd3B and Li2Pt3B
H. Q. Yuan, D. Vandervelde, M. B. Salamon +2
In this paper we present a penetration depth study on the newly discovered superconductors LiPdB and LiPtB. Surprisingly, the low-temperature penetration depth $f(T…
Magnetization measurements on Li2Pd3B superconductor
P. Badica, T. Kondo, T. Kudo +3
Magnetization in DC magnetic fields and at different temperatures have been measured on the Li2Pd3B compound. This material was recently found to show superconductivity at 7-8K. Cr…
Superconducting Properties under Magnetic Field in NaCoOHO Single Crystal
Takahiko Sasaki, Petre Badica, Naoki Yoneyama +3
We report the in-plane resistivity and magnetic susceptibility of the layered cobalt oxide NaCoOHO single crystal. The temperature dependence of the…
Evidence of large anisotropy in the magnetization of Na0.35CoO2.1.3H2O quasi-single-crystal superconductors
P. Badica, T. Kondo, K. Togano +1
Quasi-single crystals (up to 2x2x1 mm3) of Na0.35CoO2.1.3H2O-superconductor have been grown. Magnetization M(H, T) and M(T, H) curves with magnetic field approximately parallel and…
Superconducting Properties of Combustion Synthesized MgB2
Yoshihiko Takano, Nobutaka Oguro, Yoshinari Kaieda +1
We have successfully prepared the MgB2 superconducting bulk and powdered materials by the method of combustion synthesis. The starting materials used in this study were powders of…
Improvement of critical current density in Fe-sheathed MgB2 tapes by ZrSi2, ZrB2 and WSi2 doping
Yanwei Ma, H. Kumakura, A. Matsumoto +2
Fe-sheathed MgB2 tapes were prepared through the in situ powder-in-tube technique by 5 at.% ZrSi2, ZrB2 and WSi2 doping, respectively. The doping effect of these compounds on the m…
d-like Symmetry of the Order Parameter and Intrinsic Josephson Effects in Bi2212 Cross-Whisker Junctions
Yoshihiko Takano, Takeshi Hatano, Akihiro Fukuyo +5
An intrinsic tunnel junction was made using two Bi-2212 single crystal whiskers. The two whiskers with a cross-angle were overlaid at their c-planes and connected by annealing. The…
A Cross-Whiskers Junction as a Novel Fabrication Process for Intrinsic Josephson Junction
Yoshihiko Takano, Takeshi Hatano, Akihiro Fukuyo +4
A Bi2Sr2CaCu2O8+d cross-whiskers junction has been successfully discovered as a novel intrinsic Josephson junction without using any technique for micro-fabrication. Two Bi2Sr2CaCu…
Fabrication of Bi2212 Cross Whiskers Junction
Yoshihiko Takano, Takeshi Hatano, Akira Ishii +4
An intrinsic Josephson junction has been successfully fabricated without any micro-fabrication technique. Two Bi2212 whiskers were crossed with one another and joined by post-annea…
High transport critical current density obtained for Powder-In-Tube-processed MgB2 tapes and wires using stainless steel and Cu-Ni tubes
H. Kumakura, A. Matsumoto, H. Fujii +1
MgB2 tapes and wires were fabricated by the Powder-In-Tube method. Stainless steel and Cu-Ni tubes were used as sheath materials, and no heat treatment was applied. The tapes made…
Direct evidence for a multiple superconducting gap in MgB2 from high-resolution photoemission spectroscopy
S. Tsuda, T. Yokoya, T. Kiss +5
We study the new binary intermetallic superconductor MgB2 using high-resolution photo-emission spectroscopy. The superconducting-state spectrum measured at 5.4 K shows a coherent p…