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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: Transport and Magnetic Properties of YBa2Cu3O7-δBry Single Crystals
Author(s): P.P.Nguyen, Z.H.Wang, A.M.Rao, M.S.Dresselhaus, J.S.Moodera, G.Dresselhaus, H.B.Radousky, R.S.Glass, and J.Z.Liu
Publication: Physical Review B Volume: 48 Issue: 2 Year: 1993 Page(s): 1148-1155
Editor(s): Not Available
Publisher: American Physical Society
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Critical Current Density, Critical Flux Density Hc2, Magnetic Susceptibility, Coherence Length, Critical Field Strength Hc1

Materials and Properties

Y:123; [Y-Ba-Cu-O]
Material Specification for Y:123; [Y-Ba-Cu-O] Process: Solid State Reaction
Notes: The authors cite H.B. Radousky et al., Phys. Rev. B, Vol. 41, 11140 (1990), and summarize the procedure as follows. "The starting materials used for these experiments were small nearly rectangular platelets ( (about) 1.2 x 0.9 mm2 x 0.05 mm thick) of YBa2Cu3O7-δ single crystal... These crystals were deoxygenated by heating at 600 °C for (about) 12 h and subsequently brominated for 24 h at 260 °C."
Formula: YBa2Cu3O6.2Br0.9
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Temperature for Y:123; [Y-Ba-Cu-O]
ΔTc (K) Critical Temperature (K)
20 82
Measurement Method: SQUID magnetometer
"The magnetic susceptibility measurements were carried out using a superconducting quantum interference device (SQUID)... The zero-field-cooled (ZFC) data (were) taken with an applied field of (1.6 kA/m = 20 Oe) parallel to the c axis... We define Tc by magnetization measurements to be the temperature where the slope of the susceptibility vs T curve is a maximum and calculate ΔTc from the 10% and 90% points... The inductive critical current density... was obtained by sweeping the applied field between -6 T and 6 T at a fixed temperature and using the Bean critical state model formula for H//c axis... For H (perpendicular to the) c axis, a slightly modified formula is used... The critical field H is defined to be the field (after applying the sample demagnetization correction) where the magnetization versus field curve starts to deviate from linearity."

Cautions: Evaluated Data
Critical Current Density for Y:123; [Y-Ba-Cu-O]
Field Direction () Temperature (K) Magnetic Field (T) Critical Current Density (kA/cm2)
c-axis 4.2 0.00 360
c-axis 4.2 0.22 360
c-axis 4.2 1.02 150
c-axis 4.2 3.02 22
c-axis 4.2 4.02 6.5
c-axis 15 0.00 290
c-axis 15 0.22 230
c-axis 15 1.02 53
c-axis 15 2.04 12
c-axis 15 3.02 2.6
c-axis 30 0.00 180
c-axis 30 0.22 100
c-axis 30 0.40 47
c-axis 30 1.02 7.8
c-axis 30 1.51 1.3
c-axis 30 2.05 0.42
c-axis 50 0.00 74
c-axis 50 0.22 15
c-axis 50 0.51 0.90
c-axis 50 0.61 0.46
c-axis 50 0.79 0.26
c-axis 50 1.02 0.23
c-axis 50 2.02 0.061
c-axis 65 0.00 21
c-axis 65 0.05 4.9
c-axis 65 0.12 1.6
c-axis 65 0.23 0.32
c-axis 75 0.00 7.7
c-axis 75 0.00 2.5
c-axis 75 0.021 0.57
c-axis 75 0.023 0.030
ab-plane 4.2 0.04 960
ab-plane 4.2 1.00 940
ab-plane 4.2 2.50 640
ab-plane 4.2 3.53 450
ab-plane 4.2 4.48 250
ab-plane 4.2 5.49 17
ab-plane 15 0.04 770
ab-plane 15 1.00 600
ab-plane 15 1.97 420
ab-plane 15 3.00 290
ab-plane 15 4.02 93
ab-plane 30 0.03 440
ab-plane 30 0.60 350
ab-plane 30 1.29 200
ab-plane 30 1.96 50
ab-plane 50 0.07 200
ab-plane 50 0.37 130
ab-plane 50 0.79 52
ab-plane 50 0.97 15
ab-plane 65 0.03 100
ab-plane 65 0.22 92
ab-plane 65 0.33 34
ab-plane 65 0.40 9.9
ab-plane 70 0.02 22
ab-plane 70 0.10 8.9
ab-plane 70 0.10 4.1
ab-plane 70 0.08 0.083
Measurement Method: SQUID magnetometer
"The magnetic susceptibility measurements were carried out using a superconducting quantum interference device (SQUID)... The zero-field-cooled (ZFC) data (were) taken with an applied field of (1.6 kA/m = 20 Oe) parallel to the c axis... We define Tc by magnetization measurements to be the temperature where the slope of the susceptibility vs T curve is a maximum and calculate ΔTc from the 10% and 90% points... The inductive critical current density... was obtained by sweeping the applied field between -6 T and 6 T at a fixed temperature and using the Bean critical state model formula for H//c axis... For H (perpendicular to the) c axis, a slightly modified formula is used... The critical field H is defined to be the field (after applying the sample demagnetization correction) where the magnetization versus field curve starts to deviate from linearity."

Cautions: Evaluated Data
Digitized data were obtained from Figures 9 and 10 of the paper.
Critical Flux Density Hc2 for Y:123; [Y-Ba-Cu-O]
Field Direction () Temperature (K) Crit.Mag.Flux Density Hc2 (T)
c-axis 71 13.0
c-axis 74 10.7
c-axis 76 8.9
c-axis 80 6.1
c-axis 84 3.8
c-axis 88 1.6
c-axis 91 0.6
ab-plane 91 9.4
ab-plane 91 4.4
ab-plane 92 1.4
ab-plane 92 0.8
Measurement Method: Four-probe method
"The resistivity measurements... were made using a van der Pauw four-point-probe method. With the magnetic field in the ab plane or along the c axis, but always perpendicular to most of the current, the magnetoresistance was measured for current flowing in the ab plane by sweeping the magnetic field from 0 to 14 T in 20 min... we define H as the field where 50% of the normal-state resistivity is restored... coherence lengths at T = 0... are estimated from the relations derived from the effective mass model based on anisotropic Ginzburg-Landau (GL) theory..."

Cautions: Evaluated Data
Digitized data were obtained from Figure 6 of the paper.
Magnetic Susceptibility for Y:123; [Y-Ba-Cu-O]
Temperature (K) Magnetic Susceptibility (arbitrary)
8 -0.078
11 -0.080
14 -0.077
33 -0.075
57 -0.070
76 -0.060
82 -0.030
85 -0.007
86 -0.001
88 -0.004
89 -0.004
93 0.000
100 0.000
Measurement Method: SQUID magnetometer
"The magnetic susceptibility measurements were carried out using a superconducting quantum interference device (SQUID)... The zero-field-cooled (ZFC) data (were) taken with an applied field of (1.6 kA/m = 20 Oe) parallel to the c axis... We define Tc by magnetization measurements to be the temperature where the slope of the susceptibility vs T curve is a maximum and calculate ΔTc from the 10% and 90% points... The inductive critical current density... was obtained by sweeping the applied field between -6 T and 6 T at a fixed temperature and using the Bean critical state model formula for H//c axis... For H (perpendicular to the) c axis, a slightly modified formula is used... The critical field H is defined to be the field (after applying the sample demagnetization correction) where the magnetization versus field curve starts to deviate from linearity."

Cautions: Evaluated Data
"The field-cooled (FC) temperature-dependent susceptibility data showed a small positive increase... This type of effect has been observed previously and is believed to come from the flux trapping capabilities of the materials and the nonuniform distribution of the magnetic field iniside the SQUID." Digitized data were obtained from Figure 1 of the paper.
Coherence Length for Y:123; [Y-Ba-Cu-O]
Direction () Coherence Length (σ)
ab-plane 25
c-axis 1.7
Measurement Method: Four-probe method
"The resistivity measurements... were made using a van der Pauw four-point-probe method. With the magnetic field in the ab plane or along the c axis, but always perpendicular to most of the current, the magnetoresistance was measured for current flowing in the ab plane by sweeping the magnetic field from 0 to 14 T in 20 min... we define H as the field where 50% of the normal-state resistivity is restored... coherence lengths at T = 0... are estimated from the relations derived from the effective mass model based on anisotropic Ginzburg-Landau (GL) theory..."

Cautions: Evaluated Data
Critical Field Strength Hc1 for Y:123; [Y-Ba-Cu-O]
Field Direction () Temperature (K) Crit.Mag.Field Strength Hc1 (kA/m)
ab-plane 5 48
ab-plane 10 39
ab-plane 20 36
ab-plane 30 27
ab-plane 40 27
ab-plane 50 12
ab-plane 59 7
ab-plane 65 3
ab-plane 70 2
ab-plane 80 1
Measurement Method: SQUID magnetometer
"The magnetic susceptibility measurements were carried out using a superconducting quantum interference device (SQUID)... The zero-field-cooled (ZFC) data (were) taken with an applied field of (1.6 kA/m = 20 Oe) parallel to the c axis... We define Tc by magnetization measurements to be the temperature where the slope of the susceptibility vs T curve is a maximum and calculate ΔTc from the 10% and 90% points... The inductive critical current density... was obtained by sweeping the applied field between -6 T and 6 T at a fixed temperature and using the Bean critical state model formula for H//c axis... For H (perpendicular to the) c axis, a slightly modified formula is used... The critical field H is defined to be the field (after applying the sample demagnetization correction) where the magnetization versus field curve starts to deviate from linearity."

Cautions: Evaluated Data
Digitized data were obtained from Figure 11 of the paper.