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: Effect of Pressure on Superconductivity in the Quaternary Compounds RENi2B2C (RE = Lu, Y, Tm, Er, Ho)
Author(s): H. Schmidt and H.F. Braun
Publication: Physica C Volume: 229 Issue: Not Available Year: 1994 Page(s): 315-319
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature

Materials and Properties

[Lu-Ni-B-C]
[Tm-Ni-B-C]
[Er-Ni-B-C]
[Y-Ni-B-C]
[Ho-Ni-B-C]
Material Specification for ; [Lu-Ni-B-C] Process: Melt Processed
Notes: "All samples in this investigation were prepared from high-purity elements (RE 99.9%, Ni 99.9%, B 99% and C 99.5%) by arc melting stoichiometric mixtures of the ingots under argon atmosphere. First, Ni, B and the rare-earth metal were melted together and then small carbon pieces were added one by one to minimize losses. The resulting ingots were turned over and remelted four times after each step to promote homogeneity. Weight losses during arc melting were about 0.5 wt.%. After a thermal treatment of 3 days at 1100 °C under argon, the samples were quenched in water. ... From the integrated diffraction intensities, the impurity phase content was estimated to less than 2%..."
Formula: LuNi2B2C
Informal Name:
Chemical Family: Lu-Ni-B-C
Chemical Class: Carbide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for ; [Lu-Ni-B-C]
Crystal System: Tetragonal
Formula Units per Cell:
Space Group:
Cell Parameters
Temp K a Å b Å c Å
296 3.462(1) -- 10.629(2)
Measurement Method: X-ray diffraction
"X-ray powder patterns (were) taken on a powder diffractometer with secondary monochromator, using CuKα radiation. ... Lattice parameters were refined by the method of least squares..." No additional measurement details were noted.

Cautions: Evaluated Data
Critical Temperature for ; [Lu-Ni-B-C]
Pressure (GPa) Critical Temperature (K)
0.00 16.20 ± 0.2
0.16 16.23 ± 0.2
0.38 16.22 ± 0.2
0.50 16.25 ± 0.2
0.62 16.28 ± 0.2
0.86 16.31 ± 0.2
1.13 16.34 ± 0.2
1.30 16.37 ± 0.2
Measurement Method: Ac susceptibility
"The superconducting transition temperatures were measured using an AC susceptibility technique at 20 Hz. Tc is taken as the midpoint of the 10%-90% signal. The pressure dependence was determined with a piston-cylinder type hydrostatic pressure clamp with Pb as superconducting manometer." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Material Specification for ; [Tm-Ni-B-C] Process: Melt Processed
Notes: "All samples in this investigation were prepared from high-purity elements (RE 99.9%, Ni 99.9%, B 99% and C 99.5%) by arc melting stoichiometric mixtures of the ingots under argon atmosphere. First, Ni, B and the rare-earth metal were melted together and then small carbon pieces were added one by one to minimize losses. The resulting ingots were turned over and remelted four times after each step to promote homogeneity. Weight losses during arc melting were about 0.5 wt.%. After a thermal treatment of 3 days at 1100 °C under argon, the samples were quenched in water. ... From the integrated diffraction intensities, the impurity phase content was estimated to less than 2%..."
Formula: TmNi2B2C
Informal Name:
Chemical Family: Tm-Ni-B-C
Chemical Class: Carbide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for ; [Tm-Ni-B-C]
Cell Parameters
Crystal System: Tetragonal
Formula Units per Cell:
Space Group:
Cell Parameters
Temp K a Å b Å c Å
296 3.484(1) -- 10.579(2)
Measurement Method: X-ray diffraction
"X-ray powder patterns (were) taken on a powder diffractometer with secondary monochromator, using CuKα radiation. ... Lattice parameters were refined by the method of least squares..." No additional measurement details were noted.

Cautions: Evaluated Data
Critical Temperature for ; [Tm-Ni-B-C]
Pressure (GPa) Critical Temperature (K)
0.00 10.04 ± 0.2
0.40 9.96 ± 0.2
0.70 9.92 ± 0.2
0.83 9.88 ± 0.2
1.05 9.85 ± 0.2
Measurement Method: Ac susceptibility
"The superconducting transition temperatures were measured using an AC susceptibility technique at 20 Hz. Tc is taken as the midpoint of the 10%-90% signal. The pressure dependence was determined with a piston-cylinder type hydrostatic pressure clamp with Pb as superconducting manometer." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Material Specification for ; [Er-Ni-B-C] Process: Melt Processed
Notes: "All samples in this investigation were prepared from high-purity elements (RE 99.9%, Ni 99.9%, B 99% and C 99.5%) by arc melting stoichiometric mixtures of the ingots under argon atmosphere. First, Ni, B and the rare-earth metal were melted together and then small carbon pieces were added one by one to minimize losses. The resulting ingots were turned over and remelted four times after each step to promote homogeneity. Weight losses during arc melting were about 0.5 wt.%. After a thermal treatment of 3 days at 1100 °C under argon, the samples were quenched in water. ... From the integrated diffraction intensities, the impurity phase content was estimated to less than 2%..."
Formula: ErNi2B2C
Informal Name:
Chemical Family: Er-Ni-B-C
Chemical Class: Carbide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for ; [Er-Ni-B-C]
Crystal System: Tetragonal
Formula Units per Cell:
Space Group:
Cell Parameters
Temp K a Å b Å c Å
296 3.500(1) -- 10.553(2)
Measurement Method: X-ray diffraction
"X-ray powder patterns (were) taken on a powder diffractometer with secondary monochromator, using CuKα radiation. ... Lattice parameters were refined by the method of least squares..." No additional measurement details were noted.

Cautions: Evaluated Data
Critical Temperature for ; [Er-Ni-B-C]
Pressure (GPa) Critical Temperature (K)
0.00 10.42 ± 0.2
0.10 10.46 ± 0.3
0.59 10.42 ± 0.3
0.95 10.35 ± 0.3
1.06 10.35 ± 0.3
Measurement Method: Ac susceptibility
"The superconducting transition temperatures were measured using an AC susceptibility technique at 20 Hz. Tc is taken as the midpoint of the 10%-90% signal. The pressure dependence was determined with a piston-cylinder type hydrostatic pressure clamp with Pb as superconducting manometer." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Material Specification for ; [Y-Ni-B-C] Process: Melt Processed
Notes: "All samples in this investigation were prepared from high-purity elements (RE 99.9%, Ni 99.9%, B 99% and C 99.5%) by arc melting stoichiometric mixtures of the ingots under argon atmosphere. First, Ni, B and the rare-earth metal were melted together and then small carbon pieces were added one by one to minimize losses. The resulting ingots were turned over and remelted four times after each step to promote homogeneity. Weight losses during arc melting were about 0.5 wt.%. After a thermal treatment of 3 days at 1100 °C under argon, the samples were quenched in water. ... From the integrated diffraction intensities, the impurity phase content was estimated to less than 2%..."
Formula: YNi2B2C
Informal Name:
Chemical Family: Y-Ni-B-C
Chemical Class: Carbide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for ; [Y-Ni-B-C]
Crystal System: Tetragonal
Formula Units per Cell:
Space Group:
Cell Parameters
Temp K a Å b Å c Å
296 3.525(1) -- 10.536(2)
Measurement Method: X-ray diffraction
"X-ray powder patterns (were) taken on a powder diffractometer with secondary monochromator, using CuKα radiation. ... Lattice parameters were refined by the method of least squares..." No additional measurement details were noted.

Cautions: Evaluated Data
Critical Temperature for ; [Y-Ni-B-C]
Pressure (GPa) Critical Temperature (K)
0.00 15.31 ± 0.1
0.33 15.35 ± 0.1
0.59 15.31 ± 0.1
0.82 15.35 ± 0.1
0.98 15.35 ± 0.1
1.39 15.27 ± 0.2
Measurement Method: Ac susceptibility
"The superconducting transition temperatures were measured using an AC susceptibility technique at 20 Hz. Tc is taken as the midpoint of the 10%-90% signal. The pressure dependence was determined with a piston-cylinder type hydrostatic pressure clamp with Pb as superconducting manometer." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Material Specification for ; [Ho-Ni-B-C] Process: Melt Processed
Notes: "All samples in this investigation were prepared from high-purity elements (RE 99.9%, Ni 99.9%, B 99% and C 99.5%) by arc melting stoichiometric mixtures of the ingots under argon atmosphere. First, Ni, B and the rare-earth metal were melted together and then small carbon pieces were added one by one to minimize losses. The resulting ingots were turned over and remelted four times after each step to promote homogeneity. Weight losses during arc melting were about 0.5 wt.%. After a thermal treatment of 3 days at 1100 °C under argon, the samples were quenched in water. ... From the integrated diffraction intensities, the impurity phase content was estimated to less than 2%..."
Formula: HoNi2B2C
Informal Name:
Chemical Family: Ho-Ni-B-C
Chemical Class: Carbide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for ; [Ho-Ni-B-C]
Crystal System: Tetragonal
Formula Units per Cell:
Space Group:
Cell Parameters
Temp K a Å b Å c Å
296 3.515(1) -- 10.518(2)
Measurement Method: X-ray diffraction
"X-ray powder patterns (were) taken on a powder diffractometer with secondary monochromator, using CuKα radiation. ... Lattice parameters were refined by the method of least squares..." No additional measurement details were noted.

Cautions: Evaluated Data