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Microwave (EPR) measurements of the penetration depth measurements of high-Tc superconductorsThe use is discussed of electron paramagnetic resonance (EPR) as a quick and easily accessible method for measuring the London penetration depth, lambda for the high T sub c superconductors. The method uses the broadening of the EPR signal, due to the emergence of the magnetic flux lattice, of a free radical adsorbed on the surface of the sample. The second moment, of the EPR signal below T sub c is fitted to the Brandt equation for a simple triangular lattice. The precision of this method compares quite favorably with those of the more standard methods such as micro sup(+)SR, neutron scattering, and magnetic susceptibility.
Document ID
19920012372
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dalal, N. S. (West Virginia Univ. Morgantown, VA, United States)
Rakvin, B. (West Virginia Univ. Morgantown, VA, United States)
Mahl, T. A. (West Virginia Univ. Morgantown, VA, United States)
Bhalla, A. S. (West Virginia Univ. Morgantown, VA, United States)
Sheng, Z. Z. (West Virginia Univ. Morgantown, VA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1991
Publication Information
Publication: NASA. Goddard Space Flight Center, AMSAHTS 1990: Advances in Materials Science and Applications of High Temperature Superconductors
Subject Category
Solid-State Physics
Accession Number
92N21615
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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