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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: Decrease in the Intrinsic Microwave Loss of YBa2Cu3O6.95 by Zn doping
Author(s): K. Zhang, D.A. Bonn, R. Liang, D.J. Bear, and W.N. Hardy
Publication: Applied Physics Letters Volume: 62 Issue: 23 Year: 1993 Page(s): 3019-3021
Editor(s): Not Available
Publisher: American Institute of Physics
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Surface Resistance

Materials and Properties

Y:123; [Y-Ba-Cu(Zn)-O]
Material Specification for Y:123; [Y-Ba-Cu(Zn)-O] Process: Flux Growth
Notes: The authors cite R. Liang et al., Physica C, Vol. 195, 51 (1992), and summarize the procedure as follows. "... we have grown crystals... with Zn concentrations... The crystals were grown by incorporating ZnO into the same flux growth technique as that used to produce high purity crystals. The Zn concentration is inferred from susceptibility measurements of Tc using the known relationship between Zn concentration and Tc for polycrystalline samples."
Formula: YBa2Cu3-xZnxO6.95
Informal Name: Y:123
Chemical Family: Y-Ba-Cu(Zn)-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(Zn)-O]
x of Znx (formula units) Critical Temperature (K)
0 92.0
0.0045 91.6
0.0093 89.6
Measurement Method: Cavity resonator method
"Cavity perturbation techniques were used to measure the surface resistance at two different frequencies. The measurements at 3.8 GHz were obtained with a split-ring resonator technique and the 34.8 GHz data were obtained by inserting a crystal into the axial ac magnetic field of a cylindrical cavity operating in the Te011 mode. Both resonators were coated with a superconducting Pb:Sn layer in order to achieve the high Q's necessary for measurements of low loss in small samples; both measurement configurations involve currents running in the ab plane of the sample."

Cautions: Evaluated Data
Surface Resistance for Y:123; [Y-Ba-Cu(Zn)-O]
Frequency (GHz) x of Znx (formula units) Temperature () Surface Resistance (mΩ)
34.8 0 5 0.89
34.8 0 10 1.2
34.8 0 36 2.3
34.8 0 60 2.8
34.8 0 79 2.4
34.8 0 87 4.6
34.8 0 93 41
34.8 0 95 260
34.8 0 116 360
34.8 0.0045 5 0.51
34.8 0.0045 18 0.87
34.8 0.0045 39 1.6
34.8 0.0045 64 1.8
34.8 0.0045 82 2.4
34.8 0.0045 91 21
34.8 0.0045 92 110
34.8 0.0045 94 240
34.8 0.0045 116 360
34.8 0.0093 5 0.27
34.8 0.0093 30 0.77
34.8 0.0093 61 1.4
34.8 0.0093 82 2.7
34.8 0.0093 88 11
34.8 0.0093 90 190
34.8 0.0093 96 330
34.8 0.0093 116 360
3.8 0 2 0.014
3.8 0 9 0.014
3.8 0 17 0.022
3.8 0 25 0.030
3.8 0 46 0.041
3.8 0 54 0.036
3.8 0 68 0.029
3.8 0 85 0.035
3.8 0 92 0.41
3.8 0 94 45
3.8 0 96 110
3.8 0 120 130
3.8 0.0045 21 0.0098
3.8 0.0045 31 0.012
3.8 0.0045 34 0.0097
3.8 0.0045 37 0.015
3.8 0.0045 44 0.012
3.8 0.0045 58 0.017
3.8 0.0045 61 0.013
3.8 0.0045 69 0.020
3.8 0.0045 72 0.015
3.8 0.0045 75 0.020
3.8 0.0045 79 0.018
3.8 0.0045 88 0.062
3.8 0.0045 91 0.26
3.8 0.0045 110 120
3.8 0.0045 121 130
3.8 0.0093 5 0.23
3.8 0.0093 24 0.55
3.8 0.0093 39 0.94
3.8 0.0093 59 1.3
3.8 0.0093 79 2.2
3.8 0.0093 89 12
3.8 0.0093 92 240
3.8 0.0093 95 330
3.8 0.0093 116 410
Measurement Method: Cavity resonator method
"Cavity perturbation techniques were used to measure the surface resistance at two different frequencies. The measurements at 3.8 GHz were obtained with a split-ring resonator technique and the 34.8 GHz data were obtained by inserting a crystal into the axial ac magnetic field of a cylindrical cavity operating in the Te011 mode. Both resonators were coated with a superconducting Pb:Sn layer in order to achieve the high Q's necessary for measurements of low loss in small samples; both measurement configurations involve currents running in the ab plane of the sample."

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