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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: Electronic Properties of High-Temperature Superconductor DyBa2Cu3O7 from Critical Fields and Specific Heat Studies
Author(s): A. Kolodziejczyk, A. Kozlowksi, J. Chmist, R. Zalecki, T. Sciezor, Z. Tarnawski, and W.M. Woch
Publication: Acta Physica Polonica A Volume: 84 Issue: 1 Year: 1993 Page(s): 127-138
Editor(s): Not Available
Publisher: Institute of Physics of the Polish Academy of Sciences
Language: English
Notes: Proceedings of the VI International School on Magnetism
Keywords: Material Specification, Magnetic Susceptibility, Energy Gap(2 delta), Penetration Depth, Coherence Length, Critical Field Strength Hc1

Materials and Properties

Dy:123; [Dy-Ba-Cu-O]
Material Specification for Dy:123; [Dy-Ba-Cu-O] Process: Solid State Reaction
Notes: The authors cite J. Chmist, Thesis, University of Mining and Metallurgy, Krakow 1991, and summarize the procedure as follows. "The specimens were prepared by our standard sintering procedure, but a special care was taken to regrind the sintered material a few times in the agate ball-mill in order to reach as homogenized material as possible."
Formula: DyBa2Cu3O7
Informal Name: Dy:123
Chemical Family: Dy-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Magnetic Susceptibility for Dy:123; [Dy-Ba-Cu-O]
Temperature (K) Magnetic Field (kA/m) Magnetic Susceptibility (arbitrary)
77 1 -0.37
77 12 -0.36
77 40 -0.27
77 79 -0.19
77 118 -0.15
77 132 -0.14
70.5 3 -0.37
70.5 17 -0.36
70.5 48 -0.28
70.5 92 -0.22
70.5 132 -0.18
68 3 -0.40
68 13 -0.40
68 32 -0.36
68 53 -0.32
68 86 -0.26
68 119 -0.23
68 132 -0.22
61 2 -0.43
61 25 -0.43
61 44 -0.40
61 80 -0.35
61 112 -0.30
61 132 -0.29
57 2 -0.44
57 33 -0.42
57 66 -0.38
57 101 -0.35
57 120 -0.33
57 129 -0.33
57 133 -0.32
54 2 -0.44
54 33 -0.43
54 66 -0.40
54 106 -0.37
54 133 -0.35
Measurement Method: Ac susceptibility
"The in-phase a.c. susceptibility... was measured by mutual inductance bridge operating at the frequency of 237 Hz. The in-balance bridge signal in the secondary coils loaded with the given specimen was detected by the phase-sensitive lock-in amplifier. The sensitivity of the bridge as calibrated with Er2O3 is about 4 x 10-6 cm-3 µV-1 g-1. In order to determine the lower critical field as a function of temperature the a.c. susceptibility as a function of applied magnetic field and temperature was measured for the bulk as well as the powdered specimen of DyBa2Cu3O7... up to the lower critical field H ... the (susceptibility) value should be constant. Therefore, the H is defined as a maximal field for which the (susceptibility) value is still fixed... (Other quantities were calculated) according to the Ginzburg-Landau-Abrikosov-Gorkov... theory..."

Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
Energy Gap(2 delta) for Dy:123; [Dy-Ba-Cu-O]
Energy Gap (2Δ) (meV)
28
Measurement Method: Ac susceptibility
"The in-phase a.c. susceptibility... was measured by mutual inductance bridge operating at the frequency of 237 Hz. The in-balance bridge signal in the secondary coils loaded with the given specimen was detected by the phase-sensitive lock-in amplifier. The sensitivity of the bridge as calibrated with Er2O3 is about 4 x 10-6 cm-3 µV-1 g-1. In order to determine the lower critical field as a function of temperature the a.c. susceptibility as a function of applied magnetic field and temperature was measured for the bulk as well as the powdered specimen of DyBa2Cu3O7... up to the lower critical field H ... the (susceptibility) value should be constant. Therefore, the H is defined as a maximal field for which the (susceptibility) value is still fixed... (Other quantities were calculated) according to the Ginzburg-Landau-Abrikosov-Gorkov... theory..."

Cautions: Evaluated Data
Penetration Depth for Dy:123; [Dy-Ba-Cu-O]
Penetration Depth (σ)
1300
Measurement Method: Ac susceptibility
"The in-phase a.c. susceptibility... was measured by mutual inductance bridge operating at the frequency of 237 Hz. The in-balance bridge signal in the secondary coils loaded with the given specimen was detected by the phase-sensitive lock-in amplifier. The sensitivity of the bridge as calibrated with Er2O3 is about 4 x 10-6 cm-3 µV-1 g-1. In order to determine the lower critical field as a function of temperature the a.c. susceptibility as a function of applied magnetic field and temperature was measured for the bulk as well as the powdered specimen of DyBa2Cu3O7... up to the lower critical field H ... the (susceptibility) value should be constant. Therefore, the H is defined as a maximal field for which the (susceptibility) value is still fixed... (Other quantities were calculated) according to the Ginzburg-Landau-Abrikosov-Gorkov... theory..."

Cautions: Evaluated Data
Coherence Length for Dy:123; [Dy-Ba-Cu-O]
Coherence Length (σ)
9
Measurement Method: Ac susceptibility
"The in-phase a.c. susceptibility... was measured by mutual inductance bridge operating at the frequency of 237 Hz. The in-balance bridge signal in the secondary coils loaded with the given specimen was detected by the phase-sensitive lock-in amplifier. The sensitivity of the bridge as calibrated with Er2O3 is about 4 x 10-6 cm-3 µV-1 g-1. In order to determine the lower critical field as a function of temperature the a.c. susceptibility as a function of applied magnetic field and temperature was measured for the bulk as well as the powdered specimen of DyBa2Cu3O7... up to the lower critical field H ... the (susceptibility) value should be constant. Therefore, the H is defined as a maximal field for which the (susceptibility) value is still fixed... (Other quantities were calculated) according to the Ginzburg-Landau-Abrikosov-Gorkov... theory..."

Cautions: Evaluated Data
Critical Field Strength Hc1 for Dy:123; [Dy-Ba-Cu-O]
Temperature (K) Crit.Mag.Field Strength Hc1 (kA/m)
55 35
57 27
61 21
68 14
71 12
77 8
93 0
Measurement Method: Ac susceptibility
"The in-phase a.c. susceptibility... was measured by mutual inductance bridge operating at the frequency of 237 Hz. The in-balance bridge signal in the secondary coils loaded with the given specimen was detected by the phase-sensitive lock-in amplifier. The sensitivity of the bridge as calibrated with Er2O3 is about 4 x 10-6 cm-3 µV-1 g-1. In order to determine the lower critical field as a function of temperature the a.c. susceptibility as a function of applied magnetic field and temperature was measured for the bulk as well as the powdered specimen of DyBa2Cu3O7... up to the lower critical field H ... the (susceptibility) value should be constant. Therefore, the H is defined as a maximal field for which the (susceptibility) value is still fixed... (Other quantities were calculated) according to the Ginzburg-Landau-Abrikosov-Gorkov... theory..."

Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.