Pulsed Field Magnetizing Behavior of Gd-Ba-Cu-O Bulk Superconductor With a Superconducting Joint

Takemura, Kento; Sudo, Kimiaki; Dorget, Rémi; Dadiel, Longji; Sakafuji, M.; Yokoyama, K.; Oka, Tetsuo; Murakami, Masato; Sakai, Naomichi

doi:10.1109/tasc.2023.3244149

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…This is one of the pieces of evidence that the joined part is the preferential field penetration path. This discussion is done in [21], and the effect is tremendous. Therefore, it can be concluded that the effect of the preferential field penetration path is larger than the change in yoke geometry.…”

Section: Trapped Field Using Cylindrical and Bar Yokementioning

confidence: 99%

“…The joined sample showed a single peak in the trapped field properties, confirming that a good superconducting joint was achieved. In the previous study, the joined sample was magnetized using PFM, and several Hall sensors confirmed that the joined part is the preferential field penetration path because the Jc-B characteristics of each region are different [21]. The yoke geometry was changed to concentrate the long pulse in the joined part, but the trapped field was equivalent to that of the yoke before processing because the volume of the yoke was reduced.…”

Section: Introductionmentioning

confidence: 98%

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Yoke geometry study using pulsed field magnetization on superconducting joined bulk Gd-Ba-Cu-O

Takemura

Sudo

Dorget

et al. 2023

J. Phys.: Conf. Ser.

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Conditions for obtaining high-quality superconducting joint in Gd-Ba-Cu-O bulk superconductors were investigated, and the effects of PFM properties of the joined bulk and the change of yoke geometry in magnetization were examined. For a good superconducting joint fabricated by the local melting method using sintered Er-Ba-Cu-O, the J c-B property and multiple Hall sensors indicates that the joined part is the preferential field penetration path. PFM was performed using a changed geometry of yoke in which concentrated long pulse to the joined part, but the result was equivalent to the trapped field before the changing yoke because the volume of the yoke was reduced. This is the first attempt to approach an effective PFM method for the joined bulk from the viewpoint of a changed geometry of yoke.

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Section: Trapped Field Using Cylindrical and Bar Yokementioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Yoke geometry study using pulsed field magnetization on superconducting joined bulk Gd-Ba-Cu-O

Takemura

Sudo

Dorget

et al. 2023

J. Phys.: Conf. Ser.

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“…In addition, upon controlling the superconducting property J c -B of the joined part, the joined part becomes the preferential field penetration path during pulse field magnetization, which is expected to increase the efficiency of the joined bulk superconductor and its application in various fields [23]. Thus, the local melt-growth method is useful for increasing the size of the REBCO bulk and has great potential as a new magnetization method and utility in new applications.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Superconducting Joint Properties for GdBa2Cu3Ox Bulk Superconductors Joined with ErBa2Cu3Ox Superconductor Using Local Melt-Growth Method

Takemura,

Sudo,

Sakafuji

et al. 2024

Materials

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The important factors in obtaining a high-quality superconducting joint were investigated for the superconducting joint of a GdBa2Cu3Ox (GdBCO) bulk superconductor with sintered ErBa2Cu3Ox (ErBCO) using the local melt-growth method. REBCO (RE: rare earth) bulk superconductors can be used as strong magnets by magnetizing them, but they require large bulk sizes for their application. Although the superconducting joint presents a viable solution, many possibilities for property improvement remain, such as property degradation, depending on the joining direction. By varying the joining thermal conditions and confirming the elemental distribution, magnetization properties near the joined part and the effects of these on the joining properties are clarified, and a method for fabricating high-performance joined samples is obtained. Microstructure segregation was rarely observed at the center of the joined part regardless of the joining direction, and the superconducting properties were negligible and small. The Jc-B results are almost identical to those of the GdBCO matrix at a low field, confirming that the joined part minimally interferes with the superconducting current. Furthermore, by lowering the maximum temperature, shortening the holding time at the maximum temperature, and increasing the cooling rate, the region of mutual solid solution was reduced, and the Jc-B under the self-magnetic field was enhanced. These results contribute to the development of the superconducting joining method, a critical aspect of larger bulk superconductors.

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Study on the PFM Behavior of GdBCO Bulk Joined by ErBCO and Its FEM Simulation

Takemura,

Sudo,

Dorget

et al. 2024

IEEE Trans. Appl. Supercond.

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Pulsed Field Magnetizing Behavior of Gd-Ba-Cu-O Bulk Superconductor With a Superconducting Joint

Cited by 4 publications

References 20 publications

Yoke geometry study using pulsed field magnetization on superconducting joined bulk Gd-Ba-Cu-O

Yoke geometry study using pulsed field magnetization on superconducting joined bulk Gd-Ba-Cu-O

Improvement of Superconducting Joint Properties for GdBa2Cu3Ox Bulk Superconductors Joined with ErBa2Cu3Ox Superconductor Using Local Melt-Growth Method

Study on the PFM Behavior of GdBCO Bulk Joined by ErBCO and Its FEM Simulation

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