UNIGE document Scientific Article
previous document  unige:3539  next document
add to browser collection
Title

Microwave absorption across Tc: Determination of the angular dependance Hc2(theta)

Authors
Shaltiel, David
Grayevsky, A.
Sadowski, Wojciech
Published in Physical Review. B, Condensed Matter. 1991, vol. 43, no. 1S, p. 13594-13597
Abstract It is shown that measuring microwave absorption in high-Tc superconductors at constant and very low magnetic fields, using magnetic-field modulation, is, under some conditions, equivalent to temperature modulation when sweeping the temperature across Tc. Using an ESR spectrometer, the derivative of microwave absorption is measured close to Tc. This allows a determination of the relative angular variation of dHc2/dT at T=Tc in single crystals of Y-Ba-Cu-O. The data fit the Ginzburg-Landau theory on the relative angular variation of Hc2. The ratio (dHc2/dT)T=Tc parallel and perpendicular to the Cu planes was found to be 2.7 and 5.3 for two Y-Ba-Cu-O single crystals with Tc=89 and 86 K, respectively. These values obtained at 1010 Hz are close to the values obtained by conventional dc methods.
Identifiers
Full text
Structures
Research group Groupe Bill
Citation
(ISO format)
SHALTIEL, David et al. Microwave absorption across Tc: Determination of the angular dependance Hc2(theta). In: Physical Review. B, Condensed Matter, 1991, vol. 43, n° 1S, p. 13594-13597. https://archive-ouverte.unige.ch/unige:3539

211 hits

77 downloads

Update

Deposited on : 2009-10-02

Export document
Format :
Citation style :