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: Strong Shift of the Irreversibility Line in Bismuth and 6.0 GeV Pb Ions GeV Pb Ions
Author(s): V.Hardy, J.Provost, D.Groult, M.Hervieu, B.Raveau, S.Durcok, E.Pollert, J.C.Frison, J.P.Chaminade, and M.Pouchard
Publication: Physica C Volume: 191 Issue: Not Available Year: 1992 Page(s): 85-96
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Critical Temperature, Irreversibility Field

Materials and Properties

Bi:2212; [Bi-Sr-Ca-Cu-O]

Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O] Process: Flux Growth
Notes: "Single crystals of Bi-2212-type series were grown by a self-flux method... A mixture of Bi₂O₃, CuO, SrCO₃ and CaCO₃ is prepared in an agate mortar according to the ratio 0.8Bi₂O₃:1SrCO₃:1CaCO₃:1.6CuO which corresponds to a small excess of Bi₂O₃ and CuO used as flux. The mixture is melt in an alumina crucible at 1040 °C for 24 h, rapidly cooled to 970 °C and then slowly cooled (1.5 °C/h) to 830 °C before reaching RT by switching off the furnace... Single crystals of Tl-2212-type series were grown by a pseudo-flux method using Tl₂O₃, BaO or BaO₂, CaO and CuO in nearly stoichiometric molar ratios with small excess of BaO/CuO acting as solvent. Crystal growth is performed in a gold tube inserted in a silica ampoule sealed under dried oxygen and placed in a vertical tube furnace. The ampoule is heated to 730 °C by 150 °C/h, held at this temperature for 24 h before rising up to 950 °C by 50 °C/h. After 1/h at 950 °C, the ampoule is then slowly cooled to 800 °C by 3 °C/h and finally by 50 °C/h until RT... Irradiations were carried out at 300 K with Pb ions of 29 MeV/A i.e. 6.0 GeV per ion. The flux of the ion beam was arbitrarily limited to 2 x 10⁸ ions cm^-2s^-1 in order to avoid warming effects during irradiation. The crystals were irradiated along their smallest direction i.e. the c-axis, within an angle resolution of about 5° from it. In both cases Bi-2212 and Tl-2212 defects induced by 6 GeV Pb ions can be mainly ascribed to electronic energy loss effects."
Formula: Bi_1.98Sr_1.60Ca_1.40Cu_2.02O_8+y
Informal Name: Bi:2212
Chemical Family: Bi-Sr-Ca-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 Bi:2212; [Bi-Sr-Ca-Cu-O]

Irradiation Level (10¹1·Pb/cm²)	Critical Temperature (K)
0.1	85
0.5	83
1.0	82
2.0	78
3.0	73
5.0	48

Measurement Method: Magnetic susceptibility
"All magnetic measurements... were carried out with the magnetic field aligned parallel to the c direction... the transition temperature is deduced from AC susceptibility curves recorded with an AC susceptometer (Lake Shore) using a frequency of 80 Hz, an AC field of (39.8 A/m = 0.5 Oe) and a zero DC field. For Tl-2212-type single crystals, T_c is deduced from ZFC data by means of a SQUID magnetometer (Quantum Design) with a DC field (796 A/m = 10 Oe)."

Cautions: Evaluated Data
Digitized data were obtained from Figure 5 of the paper.

Irreversibility Field for Bi:2212; [Bi-Sr-Ca-Cu-O]

Irradiation Level (10¹1·Pb/cm²)	Temperature (K)	Irreversibility Field (T)
0	15	5.00
0	17	2.50
0	21	1.02
0	26	0.22
0	33	0.10
0	36	0.07
0	41	0.07
0	46	0.06
0	52	0.02
0	55	0.02
2	21	5.03
2	25	4.01
2	31	3.00
2	35	2.49
2	41	2.00
2	44	1.50
2	47	1.01
2	51	0.37
2	53	0.21
2	59	0.10
2	63	0.06
2	66	0.02

Material Specification for Tl:2212; [Tl-Ba-Ca-Cu-O] Process: Flux Growth
Notes: "Single crystals of Bi-2212-type series were grown by a self-flux method... A mixture of Bi₂O₃, CuO, SrCO₃ and CaCO₃ is prepared in an agate mortar according to the ratio 0.8Bi₂O₃:1SrCO₃:1CaCO₃:1.6CuO which corresponds to a small excess of Bi₂O₃ and CuO used as flux. The mixture is melt in an alumina crucible at 1040 °C for 24 h, rapidly cooled to 970 °C and then slowly cooled (1.5 °C/h) to 830 °C before reaching RT by switching off the furnace... Single crystals of Tl-2212-type series were grown by a pseudo-flux method using Tl₂O₃, BaO or BaO₂, CaO and CuO in nearly stoichiometric molar ratios with small excess of BaO/CuO acting as solvent. Crystal growth is performed in a gold tube inserted in a silica ampoule sealed under dried oxygen and placed in a vertical tube furnace. The ampoule is heated to 730 °C by 150 °C/h, held at this temperature for 24 h before rising up to 950 °C by 50 °C/h. After 1/h at 950 °C, the ampoule is then slowly cooled to 800 °C by 3 °C/h and finally by 50 °C/h until RT... Irradiations were carried out at 300 K with Pb ions of 29 MeV/A i.e. 6.0 GeV per ion. The flux of the ion beam was arbitrarily limited to 2 x 10⁸ ions cm^-2s^-1 in order to avoid warming effects during irradiation. The crystals were irradiated along their smallest direction i.e. the c-axis, within an angle resolution of about 5° from it. In both cases Bi-2212 and Tl-2212 defects induced by 6 GeV Pb ions can be mainly ascribed to electronic energy loss effects."
Formula: Tl₂Ba₂CaCu₂O_x
Informal Name: Tl:2212
Chemical Family: Tl-Ba-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Irreversibility Field for Tl:2212; [Tl-Ba-Ca-Cu-O]

Irradiation Level (10¹1·Pb/cm²)	Temperature (K)	Irreversibility Field (T)
0	25	5.03
0	28	2.99
0	31	1.98
0	36	0.98
0	40	0.44
0	48	0.20
0	59	0.08
0	65	0.03
0	74	0.03
2	32	4.98
2	48	2.97
2	59	1.96
2	71	0.45
2	74	0.18
2	80	0.02
2	88	0.02
2	94	0.00