Diamagnetism of YBa2Cu3O6+x crystals above Tc : evidence for Gaussian fluctuations

Scientific paper - Original scientific paper

• Author: Ivan Kokanović
• Author: D. J. Hills
• Author: M. L. Sutherland
• Author: R. Liang
• Author: J. R. Cooper
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

The magnetization of three high-quality single crystals of YBa2Cu3O6+x, from slightly overdoped to heavily underdoped, has been measured using torque magnetometry. Striking effects in the angular dependence of the torque for the two underdoped crystals, a few degrees above the superconducting transition temperature (Tc) are described well by the theory of Gaussian superconducting fluctuations using a single adjustable parameter. The data at higher temperatures (T) are consistent with a strong cut-off in the fluctuations for T ≳ 1.1Tc. Numerical estimates suggest that inelastic scattering could be responsible for this cut-off.

• Keywords (english): high temperature superconductors; magnetism; superconducting fluctuations
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical review B: Condensed matter and materials physics
• Numbering: vol. 88, no. 6, 060505(R)
• p-ISSN: 1098-0121
• e-ISSN: 1550-235X
• DOI: https://doi.org/10.1103/PhysRevB.88.060505
• URN:NBN: urn:nbn:hr:217:121359
• Publication: 2013
• Project: Number: 119-1191458-1008; Title (croatian): Električna i magnetska svojstva odabranih anorganskih i organskih materijala; Leader: Ivan Kokanović; Jurisdiction: Croatia; Funding stream: ZP
• Document URL: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.88.060505
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2013) by the American Physical Society. Received 27 March 2013; revised manuscript received 19 July 2013; published 9 August 2013.
• Created on: 2019-11-26 16:39:19