| アイテムタイプ |
共通(1) |
| 公開日 |
2017-12-20 |
| タイトル |
|
|
タイトル |
MgB_2超伝導体の帯磁率とスケーリング則(電気工学科,工学部創設40周年記念号) |
|
言語 |
ja |
| タイトル |
|
|
タイトル |
AC Susceptibilities and Scaled J_c Characteristics in MgB_2 Superconductors(DEPARTMENT OF ELECTRICAL ENGINEERING) |
|
言語 |
en |
| 作成者 |
北原, 一義
| ja |
北原, 一義
九州産業大学工学研究科電気工学専攻
|
| en |
KITAHARA, Kazuyoshi
|
| ja-Kana |
キタハラ, カズヨシ
|
Search repository
阿久根, 忠博
坂本, 進洋
松本, 泰國
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 主題 |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
MgB_2 |
| 主題 |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Magnetization |
| 主題 |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Scaling Law |
| 主題 |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Irreversibility field |
| 内容記述 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
From the real part χ' and the imaginary part χ" of AC susceptibilities, the essential features of fluxoid motion in superconductors are obtained. The χ' indicates the flux penetration and χ" gives the lossy component. The peak of χ" gives an information of the irreversibility field B_<irr>. AC susceptibilities were measured on powdered new superconductor MgB_2 using a SQUID magnetometer and a PPMS susceptometer at temperature range 4.5 - 40 K under DC magnetic fields up to 14 T. Powdered MgB_2 were divided into three samples with different particle size d by sieves with several mesh sizes : 45 < d < 50 μm, 50 < d < 63 μm and 75 < d < 100 μm. The critical temperatures are 38.5 K in all samples determined by the temperature dependence of magnetization under zfc and fc conditions. The AC susceptibilities are characterized from the ratio of superposed AC field amplitude and the characteristic pinning field b_p which is proportional to the pinning strength F_p. The Magnetic field and temperature dependence of the pinning strength F_p in type-II superconductors is known to be well formalized by the scaling law of the pinning force as F_p = AH^^m_<c2>(B/B_<irr>)γ(1 - B/B?<irr>)^δ, where B^<irr> is the irreversibility field, γ, δ and m are the pinning parameters. The temperature and field dependence of χ' and χ"can be numerically estimated using the scaling law and are favorably compared with the observed data of MgB_2 superconductors. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
九州産業大学工学部 |
|
言語 |
ja |
| 言語 |
|
|
言語 |
jpn |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AN00054266 |
| 書誌情報 |
ja : 九州産業大学工学部研究報告
号 41,
p. 79-84,
発行日 2004-12-20
|
KJ00004192814.pdf
