Abstract
The magnetic flux invasion into the Dy123-based HTS bulk magnets were experimentally evaluated during the pulsed field magnetization processes. Since the invasion of the magnetic flux into the sample would be expected to be affected by the $J-{c}$ distribution, we estimated the differences of the magnetic flux motions between the growth sector boundary (GSB) and the growth sector region (GSR) by measuring the changes of magnetic flux density and temperature during the pulsed field application of 5 T at 30 K. The experimental results on the temperature measurement showed that the magnetic flux invades into the sample through the path in the GSR prior to that in the GRB region. Furthermore, the changing rate of magnetic flux gradually changed with the position on the GSR, while they irregularly changed and did not exhibited any tendency on the GSB. This means that the magnetic flux straightly invades the sample from GSR heading for the center portion, while it does not uniformly flow on the GRB. As a result, the heat generation occurs in the GSR area prior to the GSB region. The magnetic flux invasion behavior exhibits selective and nonuniform motion, reflecting the difference of the macrostructure on the GSR and the GSB.
| Original language | English |
|---|---|
| Article number | 7405303 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 26 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2016 Apr 1 |
| Externally published | Yes |
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Keywords
- Bulk superconductor
- flux invasion
- macrostructure
- magnetic flux density
- pulsed field magnetization
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Selective Magnetic Field Invasion into HTS Bulk Magnets in Pulse Field Magnetizing Processes. / Oka, Tetsuo; Hara, Kensuke; Ogawa, Jun; Fukui, Satoshi; Sato, Takao; Yokoyama, Kazuya; Murakami, Akira; Langer, Marco.
In: IEEE Transactions on Applied Superconductivity, Vol. 26, No. 3, 7405303, 01.04.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Selective Magnetic Field Invasion into HTS Bulk Magnets in Pulse Field Magnetizing Processes
AU - Oka, Tetsuo
AU - Hara, Kensuke
AU - Ogawa, Jun
AU - Fukui, Satoshi
AU - Sato, Takao
AU - Yokoyama, Kazuya
AU - Murakami, Akira
AU - Langer, Marco
PY - 2016/4/1
Y1 - 2016/4/1
N2 - The magnetic flux invasion into the Dy123-based HTS bulk magnets were experimentally evaluated during the pulsed field magnetization processes. Since the invasion of the magnetic flux into the sample would be expected to be affected by the $J-{c}$ distribution, we estimated the differences of the magnetic flux motions between the growth sector boundary (GSB) and the growth sector region (GSR) by measuring the changes of magnetic flux density and temperature during the pulsed field application of 5 T at 30 K. The experimental results on the temperature measurement showed that the magnetic flux invades into the sample through the path in the GSR prior to that in the GRB region. Furthermore, the changing rate of magnetic flux gradually changed with the position on the GSR, while they irregularly changed and did not exhibited any tendency on the GSB. This means that the magnetic flux straightly invades the sample from GSR heading for the center portion, while it does not uniformly flow on the GRB. As a result, the heat generation occurs in the GSR area prior to the GSB region. The magnetic flux invasion behavior exhibits selective and nonuniform motion, reflecting the difference of the macrostructure on the GSR and the GSB.
AB - The magnetic flux invasion into the Dy123-based HTS bulk magnets were experimentally evaluated during the pulsed field magnetization processes. Since the invasion of the magnetic flux into the sample would be expected to be affected by the $J-{c}$ distribution, we estimated the differences of the magnetic flux motions between the growth sector boundary (GSB) and the growth sector region (GSR) by measuring the changes of magnetic flux density and temperature during the pulsed field application of 5 T at 30 K. The experimental results on the temperature measurement showed that the magnetic flux invades into the sample through the path in the GSR prior to that in the GRB region. Furthermore, the changing rate of magnetic flux gradually changed with the position on the GSR, while they irregularly changed and did not exhibited any tendency on the GSB. This means that the magnetic flux straightly invades the sample from GSR heading for the center portion, while it does not uniformly flow on the GRB. As a result, the heat generation occurs in the GSR area prior to the GSB region. The magnetic flux invasion behavior exhibits selective and nonuniform motion, reflecting the difference of the macrostructure on the GSR and the GSB.
KW - Bulk superconductor
KW - flux invasion
KW - macrostructure
KW - magnetic flux density
KW - pulsed field magnetization
UR - http://www.scopus.com/inward/record.url?scp=84963853687&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84963853687&partnerID=8YFLogxK
U2 - 10.1109/TASC.2016.2529425
DO - 10.1109/TASC.2016.2529425
M3 - Article
VL - 26
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 3
M1 - 7405303
ER -