Enhanced flux pinning in GdBaCuO bulk superconductors by Zr dopants

C. Xu; A. Hu; M. Ichihara; N. Sakai; M. Izumi; I. Hirabayashi

doi:10.1016/j.physc.2007.04.233

Enhanced flux pinning in GdBaCuO bulk superconductors by Zr dopants

C. Xu, A. Hu, M. Ichihara, N. Sakai, M. Izumi, I. Hirabayashi

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We, respectively, fabricated GdBa₂Cu₃O_7-δ (Gd123) single domain superconductors by melt growth process in air with Gd₂Ba₄CuZrO_x (GdZr2411) and nanosize ZrO₂ dopants. The microstructures and superconducting properties were investigated by scanning/transmission electron microscopy (SEM/TEM) and SQUID. GdZr2411 and BaZrO₃ particles with the average size of 50 nm were observed in the GdZr2411 and nanosize ZrO₂ doped Gd123 bulks by TEM, respectively. Critical current density (J_c) was enhanced up to 100,000 A/cm² at 77 K and self-field with 0.4 mol% nano-sized ZrO₂. The present study also showed that small amount GdZr2411 dopants (8 mol%, ratio to Gd123) were effective to induce a δT_c-type pinning.

Original language	English
Pages (from-to)	367-370
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	463-465
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/j.physc.2007.04.233
Publication status	Published - 2007 Oct 1
Externally published	Yes

Keywords

Dopant
Gd123
GdBaCuZrO
Nanoparticles
ZrO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2007.04.233

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@article{8f66e37fc49a40668e8c3c86932f3707,

title = "Enhanced flux pinning in GdBaCuO bulk superconductors by Zr dopants",

abstract = "We, respectively, fabricated GdBa2Cu3O7-δ (Gd123) single domain superconductors by melt growth process in air with Gd2Ba4CuZrOx (GdZr2411) and nanosize ZrO2 dopants. The microstructures and superconducting properties were investigated by scanning/transmission electron microscopy (SEM/TEM) and SQUID. GdZr2411 and BaZrO3 particles with the average size of 50 nm were observed in the GdZr2411 and nanosize ZrO2 doped Gd123 bulks by TEM, respectively. Critical current density (Jc) was enhanced up to 100,000 A/cm2 at 77 K and self-field with 0.4 mol% nano-sized ZrO2. The present study also showed that small amount GdZr2411 dopants (8 mol%, ratio to Gd123) were effective to induce a δTc-type pinning.",

keywords = "Dopant, Gd123, GdBaCuZrO, Nanoparticles, ZrO",

author = "C. Xu and A. Hu and M. Ichihara and N. Sakai and M. Izumi and I. Hirabayashi",

note = "Funding Information: This work was partly supported by Sasakawa Scientific Research Grant from Japan Science Society.",

year = "2007",

month = oct,

day = "1",

doi = "10.1016/j.physc.2007.04.233",

language = "English",

volume = "463-465",

pages = "367--370",

journal = "Physica C: Superconductivity and its applications",

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TY - JOUR

T1 - Enhanced flux pinning in GdBaCuO bulk superconductors by Zr dopants

AU - Xu, C.

AU - Hu, A.

AU - Ichihara, M.

AU - Sakai, N.

AU - Izumi, M.

AU - Hirabayashi, I.

N1 - Funding Information: This work was partly supported by Sasakawa Scientific Research Grant from Japan Science Society.

PY - 2007/10/1

Y1 - 2007/10/1

N2 - We, respectively, fabricated GdBa2Cu3O7-δ (Gd123) single domain superconductors by melt growth process in air with Gd2Ba4CuZrOx (GdZr2411) and nanosize ZrO2 dopants. The microstructures and superconducting properties were investigated by scanning/transmission electron microscopy (SEM/TEM) and SQUID. GdZr2411 and BaZrO3 particles with the average size of 50 nm were observed in the GdZr2411 and nanosize ZrO2 doped Gd123 bulks by TEM, respectively. Critical current density (Jc) was enhanced up to 100,000 A/cm2 at 77 K and self-field with 0.4 mol% nano-sized ZrO2. The present study also showed that small amount GdZr2411 dopants (8 mol%, ratio to Gd123) were effective to induce a δTc-type pinning.

AB - We, respectively, fabricated GdBa2Cu3O7-δ (Gd123) single domain superconductors by melt growth process in air with Gd2Ba4CuZrOx (GdZr2411) and nanosize ZrO2 dopants. The microstructures and superconducting properties were investigated by scanning/transmission electron microscopy (SEM/TEM) and SQUID. GdZr2411 and BaZrO3 particles with the average size of 50 nm were observed in the GdZr2411 and nanosize ZrO2 doped Gd123 bulks by TEM, respectively. Critical current density (Jc) was enhanced up to 100,000 A/cm2 at 77 K and self-field with 0.4 mol% nano-sized ZrO2. The present study also showed that small amount GdZr2411 dopants (8 mol%, ratio to Gd123) were effective to induce a δTc-type pinning.

KW - Dopant

KW - Gd123

KW - GdBaCuZrO

KW - Nanoparticles

KW - ZrO

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U2 - 10.1016/j.physc.2007.04.233

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M3 - Article

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JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

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ER -

Enhanced flux pinning in GdBaCuO bulk superconductors by Zr dopants

Abstract

Keywords

ASJC Scopus subject areas

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