2006 Fiscal Year Final Research Report Summary
Observation and manipulation of vortices in high-Tc superconducting micro-structures
| Project/Area Number |
16360003
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Applied materials science/Crystal engineering
|
|---|
| Research Institution | Tokyo University of Agriculture and Technology |
|---|
Principal Investigator |
ISHIBASHI Takayuki Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Research Associate, 大学院共生科学技術研究院, 助手 (20272635)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
SATO Katsuaki Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Professor, 大学院共生科学技術研究院, 教授 (50170733)
MACHIDA Masahiko Japan Atomic Energy Agency, Center for computational Science & e-Systems, Principal Scientist, システム計算科学センター, 研究主幹 (60360434)
|
|---|
| Project Period (FY) |
2004 – 2006
|
| Keywords | High temperature superconductors / Vortex / Magneto-optics / Microscope / Microstructure |
|---|
| Research Abstract |
Magneto-optica (MO) images of superconducting microstructures were investigated by the MO microscope utilizing the polarization modulation method. Samples measured in this experiment were patterned MgB2 grown by a molecular beam epitaxy method and YBCO and BSCCO grown by a metal organic decomposition method (MOD). Those samples were patterned into micon-sized structures with a size of 10 - 500 μm. Clear signal from patterned MgB_2 samples was observed even in the smallest samples with a size of 10 mm. In the case of high-Tc superconductors, inhomogeneity in those samples were clearly observed in micron-scale. Quantitative MO imaging performed here allowed us to obtain a current distribution in those samples as well as a critical current density. Regarding MO indicator films, it was found that magnetic garnet film grown by metal organic decomposition method is suitable as MO indicator films. In addition, a value of Faraday rotation was enhanced 1.5 times higher that before by increasing Bi substitution of Y site from 1 to 1.5. Those high quality garnet films makes quantative MO imaging with high sensitivity.
|
