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Title

Determination of the angular dependence of Hc2 in high Tc single crystals by a microwave technique

Authors
Shaltiel, David
Grayevsky, A.
Sadowski, S.
Published in Superconductor Science and Technology. 1991, vol. 4, no. 1S, p. 85-87
Abstract It is shown that using an ESR spectrometer with magnetic field modulation and sweeping the temperature across Tc (at a constant and a very low magnetic field), is equivalent to temperature modulation. The signal intensity obtained when crossing Tc is proportional to 1/( delta Hc2/ delta T) at T=Tc. Using the WHH relation Hc2(T=0)=0.7 Tc( delta Hc2/ delta T)T=Tc enabled the measurement of the relative angular variation of Hc2 in single crystals of YBaCuO with Tc approximately 85 K. The data fit the Ginzberg-Landau theory. This very sensitive technique can be used to characterize properties of high Tc superconducting materials. Results on thin films is also be presented.
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Research group Groupe Bill
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SHALTIEL, David et al. Determination of the angular dependence of Hc2 in high Tc single crystals by a microwave technique. In: Superconductor Science and Technology, 1991, vol. 4, n° 1S, p. 85-87. https://archive-ouverte.unige.ch/unige:3050

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Deposited on : 2009-09-21

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