Field distribution and flux-line depinning in the mixed-state of MgB2 probed by Conduction Electron Spin Resonance

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dc.creatorUrbano, R. R.
dc.creatorPagliuso, P. G.
dc.creatorRettori, C.
dc.creatorKopelevich, Y.
dc.creatorMoreno, N. O.
dc.creatorSarrao, J. L.
dc.date2002-03-21
dc.date.accessioned2026-07-07T02:44:46Z
dc.date.available2026-07-07T02:44:46Z
dc.descriptionWe report the first observation of the internal magnetic-field distribution and flux-line depinning in the vortex-state of a type-II superconductor probed by conduction electrons spin resonance (CESR) technique. The CESR measurements were performed in the recently discovered MgB2 type-II superconductor compound with transition temperature Tc ~ 39 K using microwave sources at 4.1 (S-band) and 9.5 GHz (X-band) corresponding to resonance fields of Hr ~ 1455 and 3390 Oe for g ~ 2.00 in the normal state, respectively. From the distortion of the CESR line in the superconducting state, the field distribution function, n(H), in the vortex-state was inferred, and from the broadening of the line a direct estimate of the standard deviation, sigma ~ 14 Oe, was obtained at ~ 28 K and 7 K for S-band and X-band, respectively. Furthermore, our experiments allowed the determination of the flux-line lattice depinning temperature for both employed microwave frequencies.
dc.identifierhttps://arxiv.org/abs/cond-mat/0203443
dc.identifierhttp://arxiv.org/abs/cond-mat/0203443
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19061
dc.subjectSuperconductivity
dc.titleField distribution and flux-line depinning in the mixed-state of MgB2 probed by Conduction Electron Spin Resonance
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