UNSPECIFIED (1991) A Y-89 NMR-STUDY OF YBA2CU4O8. In: 3RD INTERNATIONAL CONF ON MATERIALS AND MECHANISMS OF SUPERCONDUCTIVITY : HIGH TEMPERATURE SUPERCONDUCTORS, KANAZAWA, JAPAN, JUL 22-26, 1991. Published in: PHYSICA C, 185 (Part 2). pp. 1219-1220.

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Abstract

High resolution Y-89 NMR shift and relaxation time measurements on YBa2Cu4O8 have been performed between 80 and 380K. The shift at room temperature, approximately -50ppm, is somewhat smaller than for fully oxygenated YBa2Cu3O7-delta and the relaxation time is longer. Below approximately 200K the shift starts to decrease rapidly, behaving very like YBa2Cu3O6.8. A comparison of the shift with the Cu-63 perpendicular-to (2) data shows that they have the same temperature dependence, indicating a common susceptibility, and that the ratio of the Cu-63 perpendicular-to (2) to Y-89 hyperfine coupling constants is the same as for YBa2Cu3O7-delta. The temperature dependence of the relaxation behaviour is not Korringa like but is similar to that of YBa2Cu3O6.8.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	Q Science > QC Physics
Journal or Publication Title:	PHYSICA C
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0921-4534
Date:	1 December 1991
Volume:	185
Number:	Part 2
Number of Pages:	2
Page Range:	pp. 1219-1220
Publication Status:	Published
Title of Event:	3RD INTERNATIONAL CONF ON MATERIALS AND MECHANISMS OF SUPERCONDUCTIVITY : HIGH TEMPERATURE SUPERCONDUCTORS
Location of Event:	KANAZAWA, JAPAN
Date(s) of Event:	JUL 22-26, 1991
URI:	http://wrap.warwick.ac.uk/id/eprint/22303

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