A5056943947- Surface and Thin Film Phenomena
- Organic and Molecular Conductors Research
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Hydrogen embrittlement and corrosion behaviors in metals
- Magnetism in coordination complexes
- Electron and X-Ray Spectroscopy Techniques
- Magnetic properties of thin films
- Advanced Chemical Physics Studies
- Gas Sensing Nanomaterials and Sensors
- Iron-based superconductors research
- Analytical Chemistry and Sensors
- Theoretical and Computational Physics
- Force Microscopy Techniques and Applications
- Corrosion Behavior and Inhibition
- Superconductivity in MgB2 and Alloys
- Molecular Junctions and Nanostructures
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Advanced Materials Characterization Techniques
- Semiconductor materials and devices
- Rare-earth and actinide compounds
- Nuclear Physics and Applications
- Fuel Cells and Related Materials
- Magnetic Properties and Applications
- Nanofabrication and Lithography Techniques
National Institute for Materials Science
2011-2024
Independent Administrative Institution National Research Institute for Cultural Properties
2001
Institute of Metal Research
1994-1998
Surfaces with self‐cleaning properties are desirable for many applications. Conceptually, super liquid‐repellent surfaces required to be highly porous on the nano‐ or micrometer scale, which inherently makes them mechanically weak. Optimizing balance of mechanical strength and liquid repellency is a core aspect toward However, quantitative testing porous, challenging due their high surface roughness at different length scales low stress tolerance. For this reason, often performed...
Organic alloys λ-(BETS) 2 Fe x Ga 1- Cl 4 show superconductivity only under very high magnetic fields parallel to the conducting layer for ≥0.47. As decreases, field induced superconducting phase shifts towards lower and a striking field-induced insulator superconductor transition is observed below T =0.45. We that overall features of global diagram are well understood in terms Jaccarino-Peter compensation mechanism. These results provide new road map future design superconductors.
Abstract The dynamics of hydrogen in metals with mixed grain structure is not well understood at a microscopic scale. One the biggest issues facing economy “hydrogen embrittlement” metal induced by entering and diffusing into material. Hydrogen diffusion metallic materials difficult to grasp owing non-uniform compositions structures metal. Here time-resolved “operando microscope” was used interpret local behaviour microstructure stainless steel austenite martensite structures....
Significant effects of the long-range ``herringbone'' reconstruction on formation standing waves in Fermi-level surface-state electron density were observed for first time an Au(111)- $(23\ifmmode\times\else\texttimes\fi{}\sqrt{3})$ reconstructed surface using a low-temperature scanning tunneling microscope at 30 K. Enhanced oscillation local states was observed, especially along pairwise soliton walls, which suggests possible existence anisotropic wave propagation.
Shubnikov--de Haas (SdH) oscillations have been examined for organic conductors $\ensuremath{\lambda}\ensuremath{-}(\mathrm{BETS}{)}_{2}{\mathrm{Fe}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Cl}}_{4}$ $(x=0,$ 0.45, 0.78, and 1.0). In spite of the variety magnetic phases, no significant difference is found in Fermi surface among them. All salts similar cylindrical surfaces, whose cross-sectional areas correspond to $\ensuremath{\sim}15%$ first Brillouin zone. For $x\ensuremath{\ne}0,$ two...
Measurements of the Shubnikov--de Haas (SdH) and angular-dependent magnetoresistance oscillations were performed to study Fermi surface for a magnetic-field-induced superconductor $\ensuremath{\lambda}\ensuremath{-}(\mathrm{BETS}{)}_{2}{\mathrm{FeCl}}_{4}.$ We found two SdH ascribed minimum maximum cross-sectional areas corrugated cylindrical surface, which are estimated be $14%$ $17%$ first Brillouin zone, respectively. The mass conduction electrons is $4.1 {m}_{0},$ suggesting enhancement...
Observations of controlled domain structures in zigzag patterned cobalt wires are demonstrated. Distinct accessible by changing the orientation magnetic field using geometry, which provides a prospective potential to design desired structures. Utilizing subtle technique, we further throw light on issue magnetoresistance induced different It is found that negative contribution resistance due spin configuration around corner and shows an anomalous maximum 100 K.
We have developed chromium oxide layer segregated on electrolytic polished stainless steel (SS316L) surface as inner coat of the ultra-high vacuum chamber. In order to investigate superiority compared with only surface, thermal desorption characteristics and initial exhaust after air exposure were investigated. found that evacuation such mass number m/z=14 (mixture N CH2) 18 (H2O) well reduction hydrogen release amount in temperature raising is faster than surface. It was be suitable for...
We have demonstrated that the process of hydrogen absorption into a solid experimentally follows Langmuir-type (hyperbolic) function instead Sieverts law. This can be explained by independent two theories. One is well-known solubility theory which basis It explains amount expressed as square root pressure. succeeded in drawing same conclusion from other theory. 2-step reaction kinetics (2sRK) model expresses bulk via adsorption on surface. The 2sRK has an advantage to theory: Since it...
We present systematic resistance measurements of mesoscopic Al disk samples with three different sizes and compare them those an Al-wire sample. When a magnetic field is applied perpendicular to the disks, large excess resistance, which approximately six times larger than normal-state $({R}_{\text{n}})$, appears near critical leads connected disks. In low-field region successive resistant peaks are observed. These ascribed transitions vortex states in disk. Remarkably, some significantly...
This paper reports the measurements of Shubnikov–de Haas (SdH) and angular-dependent magnetoresistance oscillations (AMROs) for new layered organic conductors ET 3 Cl(DFBIB) Br( p BIB), where ET, DFBIB, BIB stand bis(ethylenedithio)tetrathiafulvalene, 1,4-difluoro-2,5-bis(iodoethynyl)benzene, -bis(iodoethynl)benzene, respectively. Each them has only a two-dimensional Fermi surface (FS), whose cross sectional area corresponds to about 50% first Brillouin zone. No significant difference...
We report the first observation of a single-vortex flow in mesoscopic superconductor. A single vortex is successfully controlled by an rf current superimposed on dc current, evidence which provided voltage steps current-voltage (I-V) characteristics. Irrespective number vortices confined to disk, we unambiguously observe that when inside disk driven out another enters similarly two balls colliding billiards: only one passes through Al at same time systems.
Abstract This study shows a possibility of the application membrane-type surface stress sensor (MSS) with Pd film to hydrogen sensor. It was able detect concentrations from 5 40000 ppm in nitrogen gas mixture. In case conventional using hydrogen-occluding material, it is necessary wait for state saturation. contrast, proposed method can quickly by initial rate absorption. The relationship between absorption and concentration explained considering two-step reaction kinetics into bulk via...
The operando hydrogen microscope is an original apparatus that has been developed to visualize the time-dependent permeation of through a sample. This based on ultrahigh vacuum scanning electron (UHV SEM). system consists lens focus ions produced by electron-stimulated desorption (ESD), ion detector optimized for ESD-signal detection, and two-dimensional measurement program synchronized with position information beam. detectors electrostatic lenses enable highly sensitive detection ions. In...