UNSPECIFIED (1993) NMR EVIDENCE FOR THE O-T STRUCTURAL TRANSITION IN YBA2(CU1-XMX)3O7-DELTA (M=CO, AL AND GA). PHYSICA C, 216 (3-4). pp. 491-494. ISSN 0921-4534

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Abstract

Studies of Fe, Co, Al and Ga substitution for Cu in YBa2Cu3O7-delta have reported contradictory conclusions about whether micro-twinning or a true orthorhombic-to-tetragonal transition occurs at approximately 2.5% substitution. Y-89 NMR has been used to study the structural change with doping of Co, Al or Ga for Cu in YBa2Cu3O7-delta. NMR is a microscopic probe and the chemical shift is sensitive to the local atomic arrangements within the first few neighbour shells. For these substitutions, the changes in Y-89 chemical shift provide evidence which suggests that there is an orthorhombic-to-tetragonal transition.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	PHYSICA C
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0921-4534
Date:	1 November 1993
Volume:	216
Number:	3-4
Number of Pages:	4
Page Range:	pp. 491-494
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/21006

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