Effect of laser irradiation on activation energy, irreversibility field and upper critical magnetic field of bulk MgB2 superconductor

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dc.authoridERDEM, Özge/0000-0003-4542-941X
dc.authoridERDEM, Osman Ayhan/0000-0001-7761-1078
dc.contributor.authorErdem, O.
dc.contributor.authorYanmaz, E.
dc.date.accessioned2024-09-11T19:50:19Z
dc.date.available2024-09-11T19:50:19Z
dc.date.issued2016
dc.departmentİstanbul Gelişim Üniversitesien_US
dc.description.abstractIn this study, the role of laser irradiation on the upper critical field (H-c2), the irreversibility field (H-irr) and the activation energy (U-0) of bulk MgB2 superconductor was first time investigated with the aid of magnetoresistivity measurements conducted at different applied magnetic fields in a range of 0-15 kOe as a function of temperature from 25 to 40 K. For this aim, a disk shaped MgB2 superconductor was produced and cut into two pieces. One of the pieces was irradiated under high vacuum conditions by using an Nd:YVO4 laser. The obtained results showed an increase in the critical temperature (T-c) by about 1 K after irradiation. Also, the values of H-c2(0) were respectively found to be around 143 and 151 kOe while the values of H-irr(0) were about 122 and 130 kOe for the reference and the irradiated samples. Using the thermally activated flux flow model the dependence of U-0 on magnetic field was determined. The maximum U-0 values of 0.43 and 0.83 eV in zero magnetic field were respectively obtained for the reference and the irradiated samples. Also, the magnetic field dependence of the critical current density J(c)(B) values at different temperatures were slightly increased after the irradiation. These results point out that the superconducting properties of bulk MgB2 can be improved via laser irradiation.en_US
dc.description.sponsorshipCouncil of Higher Education (Turkey)en_US
dc.description.sponsorshipThis work was supported by the Council of Higher Education (Turkey). The authors would like to acknowledge the use of Servicio General de Apoyo a la Investigacion-SAI, Universidad de Zaragoza for the laser treatments. The authors gratefully acknowledge Dr. Sukru CELIK (Sinop University) and S. Baris Guner (Recep Tayyip Erdogan University) for their assistance with the magnetoresistivity measurements.en_US
dc.identifier.doi10.1007/s10854-016-4592-4
dc.identifier.endpage6510en_US
dc.identifier.issn0957-4522
dc.identifier.issn1573-482X
dc.identifier.issue6en_US
dc.identifier.scopus2-s2.0-84964961791en_US
dc.identifier.startpage6502en_US
dc.identifier.urihttps://doi.org/10.1007/s10854-016-4592-4
dc.identifier.urihttps://hdl.handle.net/11363/7609
dc.identifier.volume27en_US
dc.identifier.wosWOS:000377898000135en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofJournal of Materials Science-Materials In Electronicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmz20240903_Gen_US
dc.titleEffect of laser irradiation on activation energy, irreversibility field and upper critical magnetic field of bulk MgB2 superconductoren_US
dc.typeArticleen_US

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