A5038670427- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- High-pressure geophysics and materials
- Nuclear reactor physics and engineering
- X-ray Diffraction in Crystallography
- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Atomic and Subatomic Physics Research
- Crystal Structures and Properties
- Rare-earth and actinide compounds
- Solid-state spectroscopy and crystallography
- Multiferroics and related materials
- Physics of Superconductivity and Magnetism
- Ferroelectric and Piezoelectric Materials
- Particle Detector Development and Performance
- Microwave Dielectric Ceramics Synthesis
- Chemical Synthesis and Characterization
- Nuclear materials and radiation effects
- Inorganic Chemistry and Materials
- Nuclear Materials and Properties
- Metal and Thin Film Mechanics
- Microstructure and Mechanical Properties of Steels
- Inorganic Fluorides and Related Compounds
- Advancements in Battery Materials
- Superconducting and THz Device Technology
Japan Atomic Energy Agency
2015-2024
Japan Proton Accelerator Research Complex
2015-2024
Hiroshima City University
2020-2022
Ibaraki University
2000-2022
Nagoya Institute of Technology
2020-2022
Kyushu University
2022
Tohoku University
2002-2020
Comprehensive Research Organization for Science and Society
2020
Nagoya University
2017-2020
Hokkaido University
2001-2020
Lattice-structural, magnetic, and magnetoelectric (ME) properties have been investigated for single crystals of prototypical polar ferrimagnet ${\mathrm{Ga}}_{2\ensuremath{-}x}{\mathrm{Fe}}_{x}{\mathrm{O}}_{3}$ $(0.8\ensuremath{\leqslant}x\ensuremath{\leqslant}1.4)$ as melt-grown by a floating-zone (FZ) method. Magnetization measurements show that the saturated magnetization well ferrimagnetic phase transition temperature $({T}_{C})$ increases with increase $\mathrm{Fe}$ content $x$, while...
Structural and electronic properties have been investigated for a series of Re-based ordered double perovskites, ${A}_{2}M{\mathrm{ReO}}_{6}$ $(A$=Sr,Ca; $M$=Mg,Sc,Cr,Mn,Fe,Co,Ni,Zn), which contain some prospective candidates the high-temperature half-metals future spin-electronic use. Neutron diffraction measurements revealed variation Re-O bond length with change its effective valence states depending on counter M ion, namely, ${\mathrm{Re}}^{6+}$- or ${\mathrm{Re}}^{5+}$-based insulating...
AMATERAS is a new disk-chopper-type spectrometer installed at Materials and Life Science Experimental Facility (MLF) of J-PARC. equipped with an extra chopper for pulse shaping the upstream position, in addition to monochromating chopper, which conventional spectrometers pulsed source have. Owing use these choppers high peak intensity from coupled moderator MLF, design realizes high-intensity high-energy-resolution measurements quasielastic inelastic neutron scattering experiments. The had...
The energy-resolved neutron imaging system, RADEN, has been installed at the pulsed source in Materials and Life Science Experimental Facility of Japan Proton Accelerator Research Complex. In addition to conventional radiography tomography, world's first beam-line a source, provides three main options for new, quantitative techniques: Bragg-edge visualize spatial distribution crystallographic information, resonance absorption elemental composition temperature polarized magnetic field...
We observed the de Haas--van Alphen oscillation in heavy fermion compound ${\mathrm{CeIrIn}}_{5}.$ The topology of Fermi surface is found to be nearly cylindrical, reflecting unique tetragonal structure. Observed branches are well explained by 4f-itinerant band model. cyclotron masses $20--{30m}_{0}$ one order larger than corresponding masses.
The neutron instruments suite, installed at the spallation source of Materials and Life Science Experimental Facility (MLF) Japan Proton Accelerator Research Complex (J-PARC), is reviewed. MLF has 23 beam ports 21 are in operation for user programs or under commissioning. A unique challenging instrumental suite been realized via combination a high-performance source, optimized scattering, using cutting-edge technologies. All are/will serve world-leading investigations broad range fields,...
A new pulsed-neutron instrument, named the Energy-Resolved Neutron Imaging System "RADEN", has been constructed at beam line of BL22 in Materials and Life Science Experimental Facility (MLF) J-PARC. The primary purpose this instrument is to perform energy-resolved neutron imaging experiments through effective utilization pulsed nature beam, making world's first dedicated experiments. RADEN was designed cover a broad energy range: from cold neutrons with down 1.05 meV (or wavelength up 8.8 Å)...
SENJU is a new single-crystal time-of-flight neutron diffractometer installed at BL18 the Materials and Life Science Experimental Facility of Japan Accelerator Research Complex (J-PARC). The was designed for precise crystal magnetic structure analyses under multiple extreme sample environments such as low temperature, high pressure field, diffraction measurements small single crystals down to 0.1 mm 3 in volume. comprises three choppers, an elliptical shape straight supermirror guide, vacuum...
Defect engineering to design for remanent polarization (Pr) and coercive field (Ec) in SrBi2Ta2O9 (SBT) is proposed. Cation vacancies coupled with substituents or oxide are shown play an essential role determining the properties. High-resolution neutron powder diffraction studies revealed that trivalent-cation (Bi, La, Nd) substitution induces Sr requirement of charge neutrality. Polarization measurements dense ceramics indicated Bi led increase 2Pr value Sr0.73Bi2.18Ta2O9 was twice as large...
Temperature- and composition-control metal-insulator (M-I) transitions have been investigated for ordered double perovskites, $({\mathrm{Sr}}_{1\ensuremath{-}y}{\mathrm{Ca}}_{y}{)}_{2}{\mathrm{FeReO}}_{6}.$ ${\mathrm{Ca}}_{2}{\mathrm{FeReO}}_{6}$ $(y=1)$ shows the thermally induced M-I transition associated with lattice-structural around 150 K. The alloyed system undergoes in almost fully spin-polarized ground state $y=0.4$ minimal enhancement of electronic specific-heat coefficient but a...
The RITS code was developed for quantitative evaluation and visualization of crystalline structural information (e.g. crystallographic texture, preferred crystal orientation, crystallite block size lattice strain, etc.) a material, analyzing position-dependent Bragg edge transmission spectra measured in an imaging experiment with pulsed neutrons. Originally, this neither able to deal all the structures that were classified into 230 types space groups, nor applicable materials composed multi...