A5069154184- Rare-earth and actinide compounds
- Iron-based superconductors research
- Inorganic Chemistry and Materials
- HVDC Systems and Fault Protection
- Magnetic Properties of Alloys
- Physics of Superconductivity and Magnetism
- High-Voltage Power Transmission Systems
- Crystallization and Solubility Studies
- Advanced Condensed Matter Physics
- Solid-state spectroscopy and crystallography
- Optical and Acousto-Optic Technologies
Muroran Institute of Technology
1986-2000
The low temperature properties of ${\mathrm{PrRu}}_{4}{\mathrm{P}}_{12}$ and ${\mathrm{PrOs}}_{4}{\mathrm{P}}_{12}$ have been studied by means electrical resistivity magnetic susceptibility measurements. decreases with decreasing from room to about 60 K, but increases sharply below K. A metal-insulator transition is found at around the phosphide shows no distinct anomaly this temperature. No significant change in powder x-ray diffraction pattern detected down 10 anomalous behavior may arise...
Ternary ruthenium arsenides with the skutterudite structure, ${\mathrm{LaRu}}_{4}{\mathrm{As}}_{12}$ and ${\mathrm{PrRu}}_{4}{\mathrm{As}}_{12}$ have been prepared at high temperatures pressures. Electrical magnetic properties of both compounds studied low temperatures. Superconductivity in was found around 10.3 2.4 K, respectively. The ${T}_{c}$ is highest amongst compounds. specific heat has measured between 2 20 K. specific-heat data can be fit to expression...
We have succeeded in synthesizing filled skutterudite-type structure compounds ${\mathrm{GdRu}}_{4}{\mathrm{P}}_{12}$ and ${\mathrm{TbRu}}_{4}{\mathrm{P}}_{12}$ under high pressure. The magnetic properties of been studied by means electrical resistivity, susceptibility, magnetization measurements. Magnetic experiments suggest that the Gd Tb ions trivalent state. compound displays features occurrence antiferromagnetic ordering below ${T}_{N}=22\mathrm{K}.$ In...
Practical application of the VSC (Voltage Source Converter) HVDC system is progressing recently due to its superior control performance over conventional line-commutated converter type system. Introduction will continue spread further by appearance MMC (Modular Multilevel topology.At present, AC circuit breaker tripped clear fault when a DC occurs at Tripping delays recovery from fault. The full bridge cell considered as one solutions without tripping breaker. However, any specific scheme...
We have prepared LnRu 4 P 12 (Ln = Nd, Gd and Tb) with filled skutterudite structure at high temperatures pressures. GdRu TbRu are new materials. Electrical resistivity dc magnetic susceptibility of these compounds were measured low temperatures. NdRu behaves as a metal, showing ferromagnetic ordering below 1.6 K. show electrical anomalies antiferromagnetic transitions around 20 both closely related to the transitions.
New Hokkaido-Honshu HVDC link, which started commissioning between Hokkaido island and Honshu on March 2019, was constructed mainly for stability in AC system. This link also has several functions with advantage of MMC-VSC including a black start function, verified these effect thorough the test. About 3-years operation, this system achieved high reliability contributing to