NIST High Temp. Superconducting Materials (HTS) Database

Bibliographic Information

Title: Thermal Conductivity of Single Cystal Tl₂Ba₂CuO₆ (Tl-2201) in Applied Magnetic Fields
Author(s): F. Yu, M.B. Salamon, V. Kopylov, N.N. Kolesnikov, H.M. Duan, and A.M. Hermann
Publication: Physica C Volume: 235 Issue: Not Available Year: 1994 Page(s): 1489-1490
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Vol. 235-240, multivolume issue
Keywords: Material Specification, Thermal Conductivity

Materials and Properties

Material Specification for Tl:221; [Tl-Ba-Cu-O] Process: Flux Growth
Notes: The authors cite A.M. Hermann et al., Phys. C, Vol. 209, 199 (1993), and summarize the procedure as follows. "The samples we studied are grown by the self-flux technique. The typical crystal size is 1 mm x 1 mm x 0.1 mm."
Formula: Tl₂Ba₂CuO₆
Informal Name: Tl:221
Chemical Family: Tl-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Thermal Conductivity for Tl:221; [Tl-Ba-Cu-O]

Magnetic Field (T)	Temperature (K)	Thermal Conductivity (W m^-1 K^-1)
0	19	2.1
0	32	3.7
0	41	4.9
0	51	6.1
0	58	6.7
0	63	7.0
0	74	6.9
0	82	6.4
0	95	5.7
0	103	5.7
2	27	2.7
2	43	4.3
2	53	5.4
2	63	6.1
2	71	6.4
2	84	5.9
2	91	5.7
2	102	5.6
5	21	2.0
5	36	3.1
5	48	4.3
5	55	5.0
5	64	5.7
5	73	6.0
5	82	5.9
5	91	5.7
5	102	5.6
8	20	2.0
8	32	2.9
8	42	3.8
8	52	4.7
8	63	5.4
8	71	5.8
8	82	5.8
8	91	5.6
8	103	5.5

Measurement Method: Steady state heat flow
"We used a steady flow technique in which a thin-film chip resistor is mounted on one end of the crystal as a heater, while other end of the crystal is heat sunk to the cryostat. A type E differential thermocouple detects the temperature difference and thus the thermal conductivity. The heater power is typically 200 µW and the temperature difference varies from 0.1 K to 0.5 K. The total loss to radiation and conduction through leads is estimated to be less than 1 % ; the absolute value is reliable within 10 %."

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