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: Two Effects of Iodine Intercalation on T_c in Bi₂Sr₂Ca_1-xY_xCu₂O₈ - Two Dimensionality and Charge Transfer
Author(s): A. Fujiwara, Y. Koike, K. Sasaki, M. Mochida, T. Noji, and Y. Saito
Publication: Physica C Volume: 203 Issue: Not Available Year: 1992 Page(s): 411-418
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature, Resistivity (normal state), Magnetic Susceptibility

Materials and Properties

Bi:2212; [Bi-Sr-Ca(Y)-Cu-O]

Material Specification for Bi:2212; [Bi-Sr-Ca(Y)-Cu-O] Process: Solid State Reaction
Notes: "Host samples... for the intercalation were prepared by a conventional solid-state reaction for 0 ≤ x ≤ 0.6. Raw materials of Bi₂O₃, SrCO₃, CaCO₃, Y₂O₃ and CuO powders were used in the molar ratio of Bi:Sr:Ca:Y:Cu=2:2:1-x:x:2. The powders were mixed and prefired in air at 800 °C for 12 h. After pulverization, the prefired materials were pelletized and sintered for 24 h at temperatures between 860 °C and 880 °C. This sintering process was carried out once again so as to obtain homogeneous samples... Iodine intercalation was done by vapor-phase reaction. The host samples... and elemental iodine were sealed in an evacuated glass tube separately. In order to avoid oxygen release from the host samples during the intercalation process, the heat treatment was made at a low temperature of 150 °C for 24 h."
Formula: Bi₂Sr₂Ca_1-xY_xCu₂O₈
Informal Name: Bi:2212
Chemical Family: Bi-Sr-Ca(Y)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for Bi:2212; [Bi-Sr-Ca(Y)-Cu-O]

Crystal System:
Formula Units per Cell:
Space Group:

**Cell Parameters**
x of Y_x (formula units)	Temp K	a Å	b Å	c Å
0.6	296	5.416	5.442	30.38
0.55	296	5.419	5.436	30.43
0.5	296	5.415	5.433	30.41
0.45	296	5.416	5.424	30.47
0.4	296	5.411	5.411	30.45
0.3	296	5.405	--	30.56
0.2	296	5.398	--	30.59
0.1	296	5.394	--	30.70
0.0	296	5.390	--	30.73

Measurement Method: X-ray diffraction
"... lattice constants (were) estimated from powder X-ray diffraction patterns using CuKα radiation..." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.

Critical Temperature for Bi:2212; [Bi-Sr-Ca(Y)-Cu-O]

x of Y_x (formula units)	Critical Temperature (K)
0.55	11
0.5	33
0.45	51
0.4	63
0.3	86
0.2	88
0.1	80
0.0	70

Measurement Method: Four-probe method
"Resistivity measurements were carried out by a standard DC four-point probe method. Lead wires were attached to samples with silver paste... T_c is defined at the midpoint of the superconducting transition curve..." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 8 of the paper.

Resistivity (normal state) for Bi:2212; [Bi-Sr-Ca(Y)-Cu-O]

x of Y_x (formula units)	Temperature (K)	Resistivity (normal state) (mΩ·cm)
0	63	0.011
0	69	0.11
0	81	0.32
0	150	0.56
0	219	0.74
0	300	1.0
0.10	72	0.011
0.10	78	0.13
0.10	89	0.60
0.10	167	0.92
0.10	231	1.1
0.10	300	1.3
0.20	78	0.011
0.20	81	0.14
0.20	95	1.0
0.20	159	1.4
0.20	222	1.7
0.20	300	2.1
0.30	72	0.011
0.30	75	0.13
0.30	89	0.86
0.30	156	1.7
0.30	213	2.0
0.30	300	2.3
0.40	52	0.011
0.40	55	0.14
0.40	72	1.3
0.40	136	2.3
0.40	205	2.8
0.40	300	3.1
0.50	26	0.016
0.50	26	0.14
0.50	29	1.1
0.50	55	3.8
0.50	124	3.8
0.50	185	4.3
0.50	234	4.7
0.50	300	5.4

Magnetic Susceptibility for Bi:2212; [Bi-Sr-Ca(Y)-Cu-O]

x of Y_x (formula units)	Temperature (K)	Magnetic Susceptibility (arbitrary)
0	7	-0.48
0	32	-0.43
0	51	-0.30
0	60	-0.13
0	70	-0.01
0	100	0
0.10	10	-0.58
0.10	41	-0.48
0.10	58	-0.30
0.10	66	-0.14
0.10	72	-0.04
0.10	80	0
0.10	100	0
0.20	19	-0.53
0.20	48	-0.41
0.20	61	-0.28
0.20	69	-0.13
0.20	75	-0.03
0.20	84	0
0.20	100	0
0.30	13	-0.47
0.30	43	-0.33
0.30	60	-0.13
0.30	68	-0.03
0.30	84	0
0.30	100	0
0.40	10	-0.48
0.40	21	-0.43
0.40	37	-0.28
0.40	44	-0.13
0.40	50	-0.04
0.40	60	-0.01
0.40	81	0
0.40	100	0
0.50	8	-0.34
0.50	14	-0.20
0.50	18	-0.08
0.50	24	-0.03
0.50	46	-0.01
0.50	69	0
0.50	100	0

Measurement Method: Ac susceptibility
"The AC magnetic susceptibility was measured with a small AC field (8 A/m = 0.1 Oe), 333 Hz) by a conventional inductance method. Temperature measurements were made with a calibrated Si-diode thermometer." No additional measurement details were noted.

Cautions: Evaluated Data
Digitized data were obtained from Figure 9 of the paper.

Material Specification for Bi:2212; [Bi-Sr-Ca(Y)-Cu-O] Process: Solid State Reaction
Notes: "Host samples... for the intercalation were prepared by a conventional solid-state reaction for 0 ≤ x ≤ 0.6. Raw materials of Bi₂O₃, SrCO₃, CaCO₃, Y₂O₃ and CuO powders were used in the molar ratio of Bi:Sr:Ca:Y:Cu=2:2:1-x:x:2. The powders were mixed and prefired in air at 800 °C for 12 h. After pulverization, the prefired materials were pelletized and sintered for 24 h at temperatures between 860 °C and 880 °C. This sintering process was carried out once again so as to obtain homogeneous samples... Iodine intercalation was done by vapor-phase reaction. The host samples... and elemental iodine were sealed in an evacuated glass tube separately. In order to avoid oxygen release from the host samples during the intercalation process, the heat treatment was made at a low temperature of 150 °C for 24 h."
Formula: Bi₂Sr₂Ca_1-xY_xCu₂O₈•yI
Informal Name: Bi:2212
Chemical Family: Bi-Sr-Ca(Y)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer:
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for Bi:2212; [Bi-Sr-Ca(Y)-Cu-O]

Crystal System:
Formula Units per Cell:
Space Group:

**Cell Parameters**
x of Y_x (formula units)	Temp K	a Å	b Å	c Å
0.6	296	5.440	--	19.05
0.55	296	5.433	--	19.04
0.5	296	5.428	--	19.00
0.45	296	5.426	--	18.99
0.4	296	5.425	--	19.02
0.3	296	5.421	--	18.97
0.2	296	5.412	--	18.96
0.1	296	5.402	--	18.95
0.0	296	5.393	--	18.90

Critical Temperature for Bi:2212; [Bi-Sr-Ca(Y)-Cu-O]

x of Y_x (formula units)	Critical Temperature (K)
0.5	31
0.45	54
0.4	66
0.3	78
0.2	74
0.1	66
0.0	57

Resistivity (normal state) for Bi:2212; [Bi-Sr-Ca(Y)-Cu-O]

x of Y_x (formula units)	Temperature (K)	Resistivity (normal state) (mΩ·cm)
0	51	1.1
0	56	14
0	73	45
0	154	61
0	239	69
0	299	80
0.10	49	1.1
0.10	56	13
0.10	68	63
0.10	80	190
0.10	126	220
0.10	174	260
0.10	226	300
0.10	300	310
0.20	46	1.1
0.20	56	16
0.20	74	110
0.20	83	230
0.20	149	280
0.20	206	300
0.20	300	310
0.30	40	1.1
0.30	53	12
0.30	74	69
0.30	91	190
0.30	163	200
0.30	223	210
0.30	300	200
0.40	23	1.0
0.40	40	30
0.40	45	50
0.40	80	240
0.40	100	260
0.40	200	240
0.40	300	200
0.50	15	6.0
0.50	16	60
0.50	32	330
0.50	58	540
0.50	126	440
0.50	192	390
0.50	249	350
0.50	300	310

Magnetic Susceptibility for Bi:2212; [Bi-Sr-Ca(Y)-Cu-O]

x of Y_x (formula units)	Temperature (K)	Magnetic Susceptibility (arbitrary)
0	15	-0.21
0	38	-0.12
0	47	-0.04
0	53	-0.01
0	66	0.00
0	100	0.00
0.10	7	-0.15
0.10	37	-0.11
0.10	55	-0.07
0.10	65	-0.03
0.10	70	-0.01
0.10	76	0.00
0.10	100	0.00
0.20	6	-0.10
0.20	23	-0.08
0.20	36	-0.07
0.20	57	-0.04
0.20	72	-0.02
0.20	83	0.00
0.20	100	0.00
0.30	9	-0.10
0.30	27	-0.08
0.30	46	-0.06
0.30	62	-0.04
0.30	78	-0.01
0.30	83	0.00
0.30	100	0.00
0.40	8	-0.07
0.40	31	-0.05
0.40	53	-0.02
0.40	66	-0.01
0.40	76	0.00
0.40	100	0.00
0.50	5	-0.04
0.50	8	-0.04
0.50	31	-0.02
0.50	43	-0.01
0.50	54	0.00
0.50	74	0.00
0.50	100	0.00