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NIST High Temp. Superconducting Materials (HTS) Database:

NIST Standard Reference Database 62

Last Update to Data Content: 1996

DOI: https://doi.org/10.18434/T4KP8J

Bibliographic Information

Title: Preparation and Transport Properties of TlBa2Ca2Cu3Oy Thin Films by Metalorganic Deposition
Author(s): S. Koike, T. Nabatame, and I. Hirabayashi
Publication: Japanese Journal of Applied Physics Volume: 32 Issue: Not Available Year: 1993 Page(s): L828-L831
Editor(s): Not Available
Publisher: Physical Soc. of Japan and the Jpn. Soc. of Applied Physics
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Critical Current Density, Resistivity (normal state)

Materials and Properties

Tl:1223; [Tl-Ba-Ca-Cu-O]
Material Specification for Tl:1223; [Tl-Ba-Ca-Cu-O] Process: Chemical Vapor Deposition
Notes: "The starting Ba-Ca-Cu-O films were prepared by the metalorganic deposition (MOD) method as follows. The percursor solutions were prepared by mixing the constituent metal naphthenates of Ba, Ca and Cu (molar ratio of 2:2:3) in toluene. These solutions were deposited onto one-face-polished SrTiO3 (100) substrates by the spin-coating technique. After supplying enough precursor solution to cover the substrate, the spin-coating machine was started with a spinning rate of 5000 rpm and an acceleration time of 0.1 seconds. The sample was spun for 10 seconds. Then these samples were heated at 500 °C for 10 minutes in air. These spin-coating and heating processes were repeated 10 times to form 1-µm-thick Ba2Ca2Cu3Oy films... postannealing in Tl2O3 vapor atmosphere was applied to make them superconducting. The films were sandwiched between two Tl-Ba-Ca-Cu-O pellets (molar ratio of Tl:Ba:Ca:Cu=1:2:2:3) and calcined in a sealed crucible at 800-900 °C. The films were placed on an alumina boat to separate them from the pellets. The films annealed at lower temperatures and longer annealing time were the single (1223) phase and exhibited high critical current densities."
Formula: TlBa2Ca2Cu3Ox
Informal Name: Tl:1223
Chemical Family: Tl-Ba-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form: Thin Film

Critical Temperature for Tl:1223; [Tl-Ba-Ca-Cu-O]
Critical Temperature (K)
106
Measurement Method: Four-probe method
"Transport critical current densitites (Jc) were measured in magnetic fields up to 7 T applied parallel and perpendicular to the a-b plane at 40, 60 and 77 K using a standard four-probe technique. Jc was determined by the 2-µV/cm criterion. The films prepared for these measurements were about 10 mm x 10 mm and 1 µm thick. They were patterned with a 1-mm-wide test bridge. Gold electrodes at 2 mm intervals were deposited on films by sputtering in the quick coating machine and were connected to silver leads with silver paste."

Cautions: Evaluated Data
Critical Current Density for Tl:1223; [Tl-Ba-Ca-Cu-O]
Field Direction () Temperature (K) Magnetic Field (T) Critical Current Density (kA/cm2)
ab-plane 40 3.0 790
ab-plane 40 4.2 580
ab-plane 40 5.1 500
ab-plane 40 6.3 400
ab-plane 40 7.2 320
ab-plane 60 2.1 740
ab-plane 60 3.0 580
ab-plane 60 4.2 400
ab-plane 60 5.5 270
ab-plane 60 6.3 250
ab-plane 60 7.2 200
ab-plane 77 0.01 630
ab-plane 77 0.05 630
ab-plane 77 0.10 630
ab-plane 77 1.1 460
ab-plane 77 2.1 290
ab-plane 77 3.2 250
ab-plane 77 5.1 120
ab-plane 77 7.2 100
c-axis 40 0.01 2100
c-axis 40 0.05 1600
c-axis 40 0.52 790
c-axis 40 1.0 580
c-axis 40 2.0 490
c-axis 40 5.0 200
c-axis 40 7.4 160
c-axis 60 0.02 1200
c-axis 60 0.03 1000
c-axis 60 0.04 950
c-axis 60 0.10 640
c-axis 60 0.55 270
c-axis 60 1.0 190
c-axis 60 1.9 75
c-axis 60 3.3 35
c-axis 60 4.2 19
c-axis 60 4.8 10
c-axis 77 0.01 620
c-axis 77 0.02 530
c-axis 77 0.06 330
c-axis 77 0.10 260
c-axis 77 0.54 53
c-axis 77 0.97 20
Measurement Method: Four-probe method
"Transport critical current densitites (Jc) were measured in magnetic fields up to 7 T applied parallel and perpendicular to the a-b plane at 40, 60 and 77 K using a standard four-probe technique. Jc was determined by the 2-µV/cm criterion. The films prepared for these measurements were about 10 mm x 10 mm and 1 µm thick. They were patterned with a 1-mm-wide test bridge. Gold electrodes at 2 mm intervals were deposited on films by sputtering in the quick coating machine and were connected to silver leads with silver paste."

Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.
Resistivity (normal state) for Tl:1223; [Tl-Ba-Ca-Cu-O]
Temperature (K) Resistivity (normal state) (mΩ·cm)
76 0
106 0
107 0.04
110 0.08
115 0.10
146 0.14
173 0.17
201 0.19
Measurement Method: Four-probe method
"Transport critical current densitites (Jc) were measured in magnetic fields up to 7 T applied parallel and perpendicular to the a-b plane at 40, 60 and 77 K using a standard four-probe technique. Jc was determined by the 2-µV/cm criterion. The films prepared for these measurements were about 10 mm x 10 mm and 1 µm thick. They were patterned with a 1-mm-wide test bridge. Gold electrodes at 2 mm intervals were deposited on films by sputtering in the quick coating machine and were connected to silver leads with silver paste."

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.