Estimation of magnetic relaxation property for CVD processed YBCO-coated conductors

Takahashi, Yasuo; Kiuchi, M.; Otabe, Edmund Soji; Matsushita, Teruo; Shikimachi, K.; Watanabe, T.; Kashima, N.; Nagàya, Shigeo

doi:10.1016/j.physc.2010.05.094

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…The magnetization and its relaxation with time were measured by a SQUID magnetometer in a magnetic field along the c-axis at 77.3 K. From the results of magnetic relaxation the E (electric field)-J (current density) curves were estimated after the method described in [9]. Then, the critical current density was determined with the electric field criterion of E c = 1.0 × 10 −9 V m −1 .…”

Section: Methodsmentioning

confidence: 99%

“…These parameters are defined in the appendix and the theoretical analysis using this model is given in [15]. Values of these parameters are adjusted so that the calculated electric field versus current density (E-J) curves agree with the observed results [9]. The obtained parameters are listed in table 3 and the theoretical prediction of E-J curves is compared with the experimental results shown in figure 6.…”

Section: Pinning Parameters In the Flux Creep Theorymentioning

confidence: 99%

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Improvement of flux pinning performance at high magnetic fields in GdBa₂Cu₃O_ycoated conductors with BHO nano-rods through enhancement ofB_c2

Matsushita

Nagamizu

Tanabe

et al. 2012

Supercond. Sci. Technol.

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Addition of BaHfO 3 (BHO) nano-rods as pinning centers into a GdBa 2 Cu 3 O y (GdBCO) coated conductor dramatically improves the critical current properties in high magnetic fields. This is partly ascribed to the strong flux pinning of these pinning centers. In this paper it is reported that this improvement is mainly caused by unexpected enhancement of the upper critical field, B c2 . The mechanism of the enhancement of B c2 is not yet clear, although the strain around the interface between the pinning center and the superconducting matrix or the interface itself may scatter electrons. This result suggests that the critical current property of REBa 2 Cu 3 O y (RE: rare earth elements, REBCO) coated conductors could be designed not only by tailoring the microstructure of pinning centers but also by controlling the intrinsic superconducting property. Especially, the selection of pinning material and its content that determines B c2 is expected to be a key problem for further improvement of the pinning performance at high magnetic fields.

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Section: Methodsmentioning

confidence: 99%

Section: Pinning Parameters In the Flux Creep Theorymentioning

confidence: 99%

Improvement of flux pinning performance at high magnetic fields in GdBa₂Cu₃O_ycoated conductors with BHO nano-rods through enhancement ofB_c2

Matsushita

Nagamizu

Tanabe

et al. 2012

Supercond. Sci. Technol.

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Parametric analysis of flux creep-flow model by using genetic algorithm

et al. 2012

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Superconducting layer thickness dependence of magnetic relaxation property in CVD processed YGdBCO coated conductors

Takahashi

Kiuchi

Otabe

et al. 2011

Physica C: Superconductivity and its Applications

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Estimation of magnetic relaxation property for CVD processed YBCO-coated conductors

Cited by 3 publications

References 6 publications

Improvement of flux pinning performance at high magnetic fields in GdBa₂Cu₃O_ycoated conductors with BHO nano-rods through enhancement ofB_c2

Improvement of flux pinning performance at high magnetic fields in GdBa₂Cu₃O_ycoated conductors with BHO nano-rods through enhancement ofB_c2

Parametric analysis of flux creep-flow model by using genetic algorithm

Superconducting layer thickness dependence of magnetic relaxation property in CVD processed YGdBCO coated conductors

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Estimation of magnetic relaxation property for CVD processed YBCO-coated conductors

Cited by 3 publications

References 6 publications

Improvement of flux pinning performance at high magnetic fields in GdBa2Cu3Oycoated conductors with BHO nano-rods through enhancement ofBc2

Improvement of flux pinning performance at high magnetic fields in GdBa2Cu3Oycoated conductors with BHO nano-rods through enhancement ofBc2

Parametric analysis of flux creep-flow model by using genetic algorithm

Superconducting layer thickness dependence of magnetic relaxation property in CVD processed YGdBCO coated conductors

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Improvement of flux pinning performance at high magnetic fields in GdBa₂Cu₃O_ycoated conductors with BHO nano-rods through enhancement ofB_c2

Improvement of flux pinning performance at high magnetic fields in GdBa₂Cu₃O_ycoated conductors with BHO nano-rods through enhancement ofB_c2