NIST High Temp. Superconducting Materials (HTS) Database

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: Hall Effect in Bulk YBa₂(Cu_1-xZn_x)₃O_7-δ
Author(s): G. Honca, M. Mehbod, A. Lanckbeen, and R. Deltour
Publication: Physical Review B Volume: 47 Issue: 22 Year: 1993 Page(s): 15265-15268
Editor(s): Not Available
Publisher: American Physical Society
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Resistivity (normal state)

Materials and Properties

Y:123; [Y-Ba-Cu(Zn)-O]

Material Specification for Y:123; [Y-Ba-Cu(Zn)-O] Process: Solid State Reaction
Notes: "A series of... compounds were prepared by the following standard solid-state powder processing technique. Powders of BaCO₃ and the oxides Y₂O₃, CuO, and ZnO, were stirred together in water, in stoichiometric quantities, and in polyethylene jars with ZrO₂ beads for 2 h. The powder was then dried and pressed at (30 MPa = 300 bars) in order to obtain pellets which were calcined at 905 °C during 160 h under O₂ flow (heating rate 3 °C/min and cooling rate 0.5 °C/min). The pellets were then ground in SiO₂ jars with SiO₂ balls. The powders were sieved (25 µm mesh), pressed into 4-cm-diam pellets and fired at 930 °C under O₂ flow for 12 h (heating rate 3 °C/min and cooling rate 0.5 °C/min). This process was repeated twice, and the pellets were then sintered at 950° under O₂ flow (heating rate 3 °C/min and cooling rate 0.5 °C/min) for 12 h and oxygenated at 500 °C during 72 h."
Formula: YBa₂Cu_3-xZn_xO_y
Informal Name: Y:123
Chemical Family: Y-Ba-Cu(Zn)-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Critical Temperature for Y:123; [Y-Ba-Cu(Zn)-O]

x of Zn_x (formula units)	y of O_y (formula units)	Critical Temperature (K)
0.00	6.91	90
0.06	6.91	69
0.12	6.92	56
0.16	6.89	50
0.17	6.89	46

Measurement Method: Electrical resistance method
"... a sample was cut from a pellet into a five terminal Hall-bar shape. Five pads were painted with silver-epoxy adhesive onto the Hall-bar shape and successively tempered at 400 °C in air for 20 min. Finally gold wires were attached with silver paste. The contact resistance depended on the bulk resistivity of the sample, but was typically less than 0.2 Ω for surfaces smaller than 10^-4 cm². We have measured the resistivity and the Hall voltage (ac current) with a lock-in technique (Princeton Applied Research, Model 5210) in magnetic field... For dc measurements, we used a Keithley 220 programmable current source, a Keithley 182 sensitive digital voltmeter and a Keithley 181 nanovoltmeter. The current intensity which passed through the sample was between 1 and 10 mA."

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

Resistivity (normal state) for Y:123; [Y-Ba-Cu(Zn)-O]

x of Zn_x (formula units)	y of O_y (formula units)	Temperature (K)	Resistivity (normal state) (mΩ·cm)
0.17	6.89	31	0.01
0.17	6.89	42	0.27
0.17	6.89	48	0.66
0.17	6.89	54	0.75
0.17	6.89	129	0.97
0.17	6.89	208	1.19
0.17	6.89	294	1.42
0.16	6.89	37	0.01
0.16	6.89	42	0.02
0.16	6.89	46	0.22
0.16	6.89	50	0.49
0.16	6.89	55	0.64
0.16	6.89	129	0.88
0.16	6.89	210	1.10
0.16	6.89	294	1.33
0.12	6.92	31	0.00
0.12	6.92	49	0.01
0.12	6.92	51	0.15
0.12	6.92	63	0.49
0.12	6.92	131	0.69
0.12	6.92	209	0.87
0.12	6.92	294	1.10
0.06	6.91	60	0.00
0.06	6.91	66	0.02
0.06	6.91	72	0.28
0.06	6.91	75	0.33
0.06	6.91	130	0.40
0.06	6.91	209	0.50
0.06	6.91	294	0.61
0.00	6.91	91	0.01
0.00	6.91	93	0.02
0.00	6.91	93	0.10
0.00	6.91	130	0.16
0.00	6.91	209	0.24
0.00	6.91	294	0.31