Non-resonant microwave absorption evidence for intrinsic Josephson coupling in $Tl_2Ba_2CaCu_2O_8$ single crystals

Joshi, Janhavi P and Anand, A and Bhat, SV and Chowdhury, P and Bhatia, SN (2000) Non-resonant microwave absorption evidence for intrinsic Josephson coupling in $Tl_2Ba_2CaCu_2O_8$ single crystals. In: Physica C, 341-34 (2). pp. 1229-1230.

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Abstract

We report the results of our non-resonant microwave absorption (NRMA) studies on single crystals of $Tl_2Ba_2CaCu_2O_8$ (Tl 2212) which reflect the occurrence of intrinsic Josephson coupling in these crystals. We have studied the magnetic field induced microwave absorption at various temperatures from 4.2K to $T_c (-104K)$ using a standard CW EPR spectrometer $(H_{dc}\parallel c)$. We observe the appearance of a characteristic feature in the NRMA signals similar to the ones observed earlier by us in $Bi_2Sr_2CaCu_2O_8 (Bi 2212)$ starting a few degrees below $T_c$, which on cooling passes through a maximum in intensity before disappearing at a further low temperature. This behaviour is attributed to the appearance, strengthening and disappearance of Josephson response consequent to the temperature dependence of the viscosity of the Josephson medium between the $CuO_2$ superconducting sheets.

Item Type:	Journal Article
Publication:	Physica C
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	28 May 2007
Last Modified:	19 Sep 2010 04:36
URI:	http://eprints.iisc.ac.in/id/eprint/10319

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