Preparation and Properties of Low‐Calcium–Content Superconductive Thin Films in Bismuth Systems

Keizou Tsukamoto; Hiromasa Shimojima; Mamoru Ishii; Naoya Enomoto; Chitake Yamagishi

doi:10.1111/j.1151-2916.1993.tb05331.x

Preparation and Properties of Low‐Calcium–Content Superconductive Thin Films in Bismuth Systems

Keizou Tsukamoto, Hiromasa Shimojima, Mamoru Ishii, Naoya Enomoto, Chitake Yamagishi

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

1 Citation (Scopus)

Abstract

Superconductive, polycrystalline thin films from Bi systems with low Ca content in relation to the high‐T_c phase and with various Bi(Pb) contents were obtained by two‐step annealing of the deposited amorphous films prepared by rf magnetron sputtering. The obtained films, A, B, and C, exhibited a high T_c (T_c > 100 K) for a wide range of secondary annealing temperatures. The critical current densities of these films at 77.3 K in zero magnetic field were sensitive to the secondary annealing temperature. The highest critical current densities of the films were 27000, 3900, and 5500 A/cm² for films A, B, and C, respectively. Film B exhibited large decreases in critical current density under an applied magnetic field. The grain boundaries of this film, which were composed of PbO, CuO, and Bi₂O₃, apparently acted as weak links in the superconductor materials.

Original language	English
Pages (from-to)	1031-1039
Number of pages	9
Journal	Journal of the American Ceramic Society
Volume	76
Issue number	4
DOIs	https://doi.org/10.1111/j.1151-2916.1993.tb05331.x
Publication status	Published - Jan 1 1993

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Geology
Geochemistry and Petrology
Materials Chemistry

Access to Document

10.1111/j.1151-2916.1993.tb05331.x

Cite this

@article{d00ab71e85ba4117ad587dcec060ae13,

title = "Preparation and Properties of Low‐Calcium–Content Superconductive Thin Films in Bismuth Systems",

abstract = "Superconductive, polycrystalline thin films from Bi systems with low Ca content in relation to the high‐Tc phase and with various Bi(Pb) contents were obtained by two‐step annealing of the deposited amorphous films prepared by rf magnetron sputtering. The obtained films, A, B, and C, exhibited a high Tc (Tc > 100 K) for a wide range of secondary annealing temperatures. The critical current densities of these films at 77.3 K in zero magnetic field were sensitive to the secondary annealing temperature. The highest critical current densities of the films were 27000, 3900, and 5500 A/cm2 for films A, B, and C, respectively. Film B exhibited large decreases in critical current density under an applied magnetic field. The grain boundaries of this film, which were composed of PbO, CuO, and Bi2O3, apparently acted as weak links in the superconductor materials.",

author = "Keizou Tsukamoto and Hiromasa Shimojima and Mamoru Ishii and Naoya Enomoto and Chitake Yamagishi",

year = "1993",

month = jan,

day = "1",

doi = "10.1111/j.1151-2916.1993.tb05331.x",

language = "English",

volume = "76",

pages = "1031--1039",

journal = "Journal of the American Ceramic Society",

issn = "0002-7820",

publisher = "Wiley-Blackwell",

number = "4",

}

TY - JOUR

T1 - Preparation and Properties of Low‐Calcium–Content Superconductive Thin Films in Bismuth Systems

AU - Tsukamoto, Keizou

AU - Shimojima, Hiromasa

AU - Ishii, Mamoru

AU - Enomoto, Naoya

AU - Yamagishi, Chitake

PY - 1993/1/1

Y1 - 1993/1/1

N2 - Superconductive, polycrystalline thin films from Bi systems with low Ca content in relation to the high‐Tc phase and with various Bi(Pb) contents were obtained by two‐step annealing of the deposited amorphous films prepared by rf magnetron sputtering. The obtained films, A, B, and C, exhibited a high Tc (Tc > 100 K) for a wide range of secondary annealing temperatures. The critical current densities of these films at 77.3 K in zero magnetic field were sensitive to the secondary annealing temperature. The highest critical current densities of the films were 27000, 3900, and 5500 A/cm2 for films A, B, and C, respectively. Film B exhibited large decreases in critical current density under an applied magnetic field. The grain boundaries of this film, which were composed of PbO, CuO, and Bi2O3, apparently acted as weak links in the superconductor materials.

AB - Superconductive, polycrystalline thin films from Bi systems with low Ca content in relation to the high‐Tc phase and with various Bi(Pb) contents were obtained by two‐step annealing of the deposited amorphous films prepared by rf magnetron sputtering. The obtained films, A, B, and C, exhibited a high Tc (Tc > 100 K) for a wide range of secondary annealing temperatures. The critical current densities of these films at 77.3 K in zero magnetic field were sensitive to the secondary annealing temperature. The highest critical current densities of the films were 27000, 3900, and 5500 A/cm2 for films A, B, and C, respectively. Film B exhibited large decreases in critical current density under an applied magnetic field. The grain boundaries of this film, which were composed of PbO, CuO, and Bi2O3, apparently acted as weak links in the superconductor materials.

UR - http://www.scopus.com/inward/record.url?scp=84986414604&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84986414604&partnerID=8YFLogxK

U2 - 10.1111/j.1151-2916.1993.tb05331.x

DO - 10.1111/j.1151-2916.1993.tb05331.x

M3 - Article

AN - SCOPUS:84986414604

SN - 0002-7820

VL - 76

SP - 1031

EP - 1039

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 4

ER -

Preparation and Properties of Low‐Calcium–Content Superconductive Thin Films in Bismuth Systems

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this