Taichiro Nishio
YOU?
Author Swipe
View article: Prediction of Phase Formation in Layered Perovskite Arsenic Fluorides
Prediction of Phase Formation in Layered Perovskite Arsenic Fluorides Open
We identify a phase formation indicator that is generally unknown in multinary compounds and use it to predict phase formation in new materials. In particular, we focus on layered perovskite compounds as a typical example of multinary syst…
View article: Doping Dependence of Upper Critical Field of High-<i>T</i><sub>c</sub> Cuprate Bi<sub>2+</sub><i><sub>x</sub></i>Sr<sub>2−</sub><i><sub>x</sub></i>CaCu<sub>2</sub>O<sub>8+</sub><i><sub>δ</sub></i> Estimated from Irreversibility Field at Zero Temperature
Doping Dependence of Upper Critical Field of High-<i>T</i><sub>c</sub> Cuprate Bi<sub>2+</sub><i><sub>x</sub></i>Sr<sub>2−</sub><i><sub>x</sub></i>CaCu<sub>2</sub>O<sub>8+</sub><i><sub>δ</sub></i> Estimated from Irreversibility Field at Zero Temperature Open
We investigated the temperature (T) dependence of the irreversibility field\nHirr(T) in high-critical-temperature cuprate Bi2+xSr2-xCa1-yYyCu2O8+d (Bi-2212)\nsingle crystals over a wide range of hole doping level (p). Hirr(T) was\nevaluate…
View article: Ginzburg–Landau simulations of three-terminal operation of a superconducting nanowire cryotron
Ginzburg–Landau simulations of three-terminal operation of a superconducting nanowire cryotron Open
Superconducting nanowire cryotrons (nTrons) are expected to be used as interfaces for super-high-performance hybrid devices in which superconductor and semiconductor circuits are combined. However, nTrons are still under development, and d…
View article: Single-Crystal Growth and Characterization of Cuprate Superconductor (Hg,Re)Ba<sub>2</sub>Ca<sub>2</sub>Cu<sub>3</sub>O<sub>8+</sub><i><sub>δ</sub></i>
Single-Crystal Growth and Characterization of Cuprate Superconductor (Hg,Re)Ba<sub>2</sub>Ca<sub>2</sub>Cu<sub>3</sub>O<sub>8+</sub><i><sub>δ</sub></i> Open
We grew (Hg,Re)Ba$_2$Ca$_2$Cu$_3$O$_{8+\\delta}$ ((Hg,Re)1223) single crystals\nwith good reproducibility via the single-step flux method using monoxides as\nraw materials. A double-sealing method using a thick-walled quartz tube and a\nst…
View article: Structure, optical, and electrical properties of layered oxychalcogenide Sr<sub>2</sub>ZnCu<sub>2</sub>(S<sub>1−x </sub>Se<sub> x </sub>)<sub>2</sub>O<sub>2</sub> (0 ≤ x ≤ 1) compounds
Structure, optical, and electrical properties of layered oxychalcogenide Sr<sub>2</sub>ZnCu<sub>2</sub>(S<sub>1−x </sub>Se<sub> x </sub>)<sub>2</sub>O<sub>2</sub> (0 ≤ x ≤ 1) compounds Open
Layered oxychalcogenide Sr 2 ZnCu 2 (S 1- x Se x ) 2 O 2 compounds were synthesized via a solid-state reaction. Density functional theory calculations indicate different valence band maximum, Sr 2 ZnCu 2 Se 2 O 2 was composed of Cu 3 d –Se…
View article: Vortex arrangement in an ultrathin superconducting bilayer disc
Vortex arrangement in an ultrathin superconducting bilayer disc Open
A direct current superconducting quantum interference device (SQUID) fixed on a recently developed superconducting bilayer disc is effective for studying fractional magnetic quantum and fractional vortices. However, such devices cannot mag…
View article: Sharp edged Gd<sub>2</sub>BaCuO<sub>5</sub> particles addition effect on growth and properties of top-seeded melt-grown GdBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ </sub> bulk superconductors
Sharp edged Gd<sub>2</sub>BaCuO<sub>5</sub> particles addition effect on growth and properties of top-seeded melt-grown GdBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ </sub> bulk superconductors Open
We report on top-seeded melt growth of GdBa 2 Cu 3 O 7- δ (GdBCO) bulks added by sharp edged Gd 2 BaCuO 5 nanoparticles (Gd211 U ) refined by ultrasonication. GdBCO bulks mixed with 30 mol.% of Gd211U were examined to be grown isothermally…
View article: High-energy ultrasonic irradiation effects on the growth and critical current density of top-seeded melt grown single grain YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> bulk superconductors
High-energy ultrasonic irradiation effects on the growth and critical current density of top-seeded melt grown single grain YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> bulk superconductors Open
The enhancement of a critical current density ( J c ) of REBa 2 Cu 3 O 7- δ (REBCO/YBCO, where RE=rare earth elements and Y) bulk superconductors can be achieved via dispersing normal-conductive RE 2 BaCuO 5 (Y211) particles and other defe…
View article: Observation of multiple fractional quanta in a superconducting bilayer disk with a pinhole
Observation of multiple fractional quanta in a superconducting bilayer disk with a pinhole Open
The magnetic-flux quantum (Φ0) cannot be generally divided into smaller ones in a usual superconductor. If a subdividing path is present, the science and technology of the superconductor drastically change. In previous studies, we experime…
View article: Experimental and Computational Determination of Optimal Boron Content in Layered Superconductor Sc<sub>20</sub>C<sub>8–<i>x</i></sub>B<sub><i>x</i></sub>C<sub>20</sub>
Experimental and Computational Determination of Optimal Boron Content in Layered Superconductor Sc<sub>20</sub>C<sub>8–<i>x</i></sub>B<sub><i>x</i></sub>C<sub>20</sub> Open
It is generally difficult to quantify the amount of light elements in materials because of their low X-ray-scattering power, as this means that they cannot be easily estimated via X-ray analyses. Meanwhile, the recently reported layered su…
View article: Highly c-axis orientated superconducting core and large critical current density in Ba0.6Na0.4Fe2As2 powder-in-tube tape
Highly c-axis orientated superconducting core and large critical current density in Ba0.6Na0.4Fe2As2 powder-in-tube tape Open
Improvement of the critical current density ( J c ) of superconducting wires/tapes is one of the key issues in the field of superconductivity applications. Here we report the fabrication of a silver-sheathed Ba 1− x Na x Fe 2 As 2 (BaNa-12…
View article: Effect of non-magnetic rare earth substitution for Zr on mixed anion Zr(P, Se)<sub>2</sub> superconductors II
Effect of non-magnetic rare earth substitution for Zr on mixed anion Zr(P, Se)<sub>2</sub> superconductors II Open
In ZrP 1.25 Se 0.75 , the superconducting transition temperature T c is increased from 5.8 K to 7.6 K when Sc atoms are partially substituted for Zr atoms having almost the same atomic radius as Sc atoms. Transport measurements show that h…
View article: Effect of non-magnetic rare earth substitution for Zr on mixed anion Zr(P, Se)<sub>2</sub> superconductors
Effect of non-magnetic rare earth substitution for Zr on mixed anion Zr(P, Se)<sub>2</sub> superconductors Open
It is shown that the maximum superconducting transition temperature, Tc for ZrP1.25Se0.75 is increased from 5.8 K to 7.2 K by partially substituting a non-magnetic rare earth atom Lu for Zr and on the other hand is decreased by substitutin…
View article: Single Crystal growth of mixed anion Zr(P, Se)<sub>2</sub> superconductor and related materials
Single Crystal growth of mixed anion Zr(P, Se)<sub>2</sub> superconductor and related materials Open
A new method to grow single crystals of PbFCl-type mixed anion AP2-xXx (A = Zr, Hf, X = S, Se) superconductor is examined. Using a wedge-type, cubic-anvil, high-pressure apparatus, single crystals of ZrP1.25Se0.75 (A = Zr, X = Se) were gra…
View article: Abnormal Meissner state in a superconducting bilayer
Abnormal Meissner state in a superconducting bilayer Open
An ultrathin superconducting bilayer can admit a monotonic magnetic field when one layer has a slit even in a Meissner state. The rotation of the superconducting quantum phase by a vector potential for the magnetic field is compensated by …
View article: Experimental formation of a fractional vortex in a superconducting bi-layer
Experimental formation of a fractional vortex in a superconducting bi-layer Open
We report the experimental formation of a fractional vortex generated by using a thin superconducting bi-layer in the form of a niobium bi-layer, observed as a magnetic flux distribution image taken by a scanning superconducting quantum in…