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dc.contributor.authorErdem, Ö.es_ES
dc.contributor.authorRey-García, F.es_ES
dc.contributor.authorLahoz, Ruthes_ES
dc.contributor.authorFrancisco, I. dees_ES
dc.contributor.authorAngurel, Luis A.es_ES
dc.contributor.authorFuente, Germán F. de laes_ES
dc.identifier.citationACASC 2013es_ES
dc.descriptionResumen del póster presentado a la 7th Asian Conference on Applied Superconductivity and Cryogenics celebrado en Capadocia (Turquia) del 23 al 25 de octubre de 2013.es_ES
dc.description.abstractMgB2 bulk superconductors were fabricated by an in-situ solid state reaction method. The surface of the MgB2 samples thus obtained was irradiated, under high vacuum, in dot-shape geometric patterns by using a Nd:YVO4 diode-pumped laser, to investigate the effect of laser irradiation on their structure, microstructure and magnetic properties. Structural and microstructure changes were analysed by using X-ray diffraction (XRD), confocal and scanning electron microscopy (SEM). The magnetic properties (M-H curves) of the samples were determined using a magnetic properties measurement system (MPMS). The magnetic field dependence of the critical current density, Jc was calculated from M(H) loops by using Bean’s critical model at 5 K and 20 K. The results indicate that the Jc value enhanced at a certain ratio in the irradiated superconductors compared to the un-irradiated ones. To confirm that the improvement in Jc of the irradiated MgB2 is due to an improved flux-pinning behaviour, the variation of Fp/Fp,max with magnetic field was calculated at 5 K. It was found that the pinning force curves of the irradiated samples shift toward the high field side indicating an improvement in the flux pinning with respect to the un-irradiated samples. These results show that the patterns are effective to improve the flux pinning in MgB2 bulk superconductors.es_ES
dc.titleChanges in Nd:YVO4 laser irradiated MgB2 bulk superconductorses_ES
dc.description.peerreviewedPeer reviewedes_ES
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