Bibliographic Information
Title: Characterisation of Superconducting Hg-Ba-Ca-Cu-Oxides
Author(s): M. Cantoni, A. Schilling, H.U. Nissen, and H.R. Ott
Publication: Physica C Volume: 215 Issue: Not Available Year: 1993 Page(s): 11-18
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature, Magnetic Susceptibility
Materials and Properties

Material Specification for Hg:1212; [Hg-Ba-Ca-Cu-O]
Process: Solid State Reaction
Notes: The authors cite A. Schilling et al., Nature (London), Vol. 363, 56 (1993), and summarize the procedure as follows. "After sintering, the resulting materials were usually annealed for several hours in flowing oxygen."
Formula: HgBa2CaCu2O6+x
Informal Name: Hg:1212
Chemical Family: Hg-Ba-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

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Crystallography for Hg:1212; [Hg-Ba-Ca-Cu-O]

Crystal System: Tetragonal
Formula Units per Cell:
Space Group: P4/mmm

Cell Parameters
Temp K a Å b Å c Å
296 3.85 -- 12.75


Atomic Coordinates
Atom Temp K a-axis b-axis c-axis
Hg 296 0 0 0
Ba 296 0.5 0.5 0.22
Ca 296 0.5 0.5 0.5
Cu 296 0 0 0.375
O(1) 296 0 0.5 0.38
O(2) 296 0 0 0.154
O(3) 296 0.5 0.5 0


Measurement Method: X-ray diffraction
"... the samples were structurally characterised by X-ray diffraction (Guinier-technique)." No additional measurement details were noted.

Cautions: Unevaluated Data

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Critical Temperature for Hg:1212; [Hg-Ba-Ca-Cu-O]
Critical Temperature (K)
125


Measurement Method: SQUID magnetometer
"The critical temperatures for superconductivity were determined by measurements of the magnetic susceptibility using a SQUID magnetometer..." No additional measurement details were noted.

Cautions: Evaluated Data

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Magnetic Susceptibility for Hg:1212; [Hg-Ba-Ca-Cu-O]
Temperature (K) Magnetic Susceptibility (arbitrary)
110 -0.0022
113 -0.0016
114 -0.0014
115 -0.0011
116 -0.0011
119 -0.0007
123 -0.0001
125 0
130 0


Measurement Method: SQUID magnetometer
"The critical temperatures for superconductivity were determined by measurements of the magnetic susceptibility using a SQUID magnetometer..." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.

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