NIST High Temp. Superconducting Materials (HTS) Database

Bibliographic Information

Title: Anisotropic Thermoelectric Power and Thermal Conductivity in Superconducting Single Crystals Bi-Sr-Ca-Cu-O
Author(s): M. Pekala, K. Kitazawa, A.M. Balbashov, A. Polaczek, I. Tanaka, and H. Kojima
Publication: Solid State Communications Volume: 76 Issue: 3 Year: 1990 Page(s): 419-421
Editor(s): Not Available
Publisher: Pergamon Press Ltd
Language: English
Notes: Not Available
Keywords: Material Specification, Thermoelectric Power

Materials and Properties

Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O] Process: Floating Zone
Notes: "The plate shape crystals studies were grown by two different techniques. A floating zone method in oxygen atmosphere with the growth rate of 1 mm h^-1 and oxygen post annealing at 820 °C produced samples (K) with composition Bi₂Sr_1.9Ca_0.7Cu₂O_x. The (B) samples with composition Bi₂Sr₂Ca₁Cu₂O_x were obtained at the rate of 1 mm h^-1 applying the modified crucibleless floating zone technique in the air atmosphere and air annealing at 600 °C to 700 °C. The length and width of crystals were typically 6 mm to 7 mm and 2.5 mm to 4 mm, respectively. Their dimensions along the c axis ranged between 0.2 mm and 1 mm."
Formula: Bi₂Sr₂CaCu₂O_x
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:

Thermoelectric Power for Bi:2212; [Bi-Sr-Ca-Cu-O]

Sample Number ()	Direction ()	Temperature (K)	Thermoelectric Power (µV/K)
B	ab	101	6.4
B	ab	127	7.2
B	ab	198	4.6
B	ab	238	2.9
B	ab	292	1.0
B	c	102	3.5
B	c	147	2.7
B	c	202	1.7
B	c	250	1.2
B	c	293	0.6
K	ab	104	2.6
K	ab	118	4.1
K	ab	152	3.5
K	ab	204	2.6
K	ab	250	1.7
K	ab	300	0.6
K	c	101	1.3
K	c	109	3.5
K	c	126	4.4
K	c	147	4.5
K	c	194	3.8
K	c	230	3.2
K	c	273	2.4
K	c	294	1.8

Measurement Method: Thermopower method
The authors cite M. Pekala et al., Physica C, Vol. 156, 497 (1988), and summarize the procedure as follows. "Thermoelectric power was measured versus the copper leads silver painted to the crystals and corrected for thermoelectric power of copper. For thermoelectric and thermal conductivity measurements the temperature gradient up to 2-4 K monitored with copper-constantan thermocouples was generated using the heater of several mW attached to the sample."

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