caa a22 4500 445382082 CHVBK 20180317143020.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-1056-6 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1056-6 Analysis of the Current Noise Produced in Stationary Conditions in MgB2 Films at Different Stages of the Superconducting Transition [Elektronische Daten] [E. Monticone, C. Portesi, E. Taralli, M. Rajteri, V. Andreoli, C. Gandini, A. Masoero] In previous papers (Mazzetti et al. in Phys. Rev.B 77:064516, 2008; Ponta et al. in Phys. Rev.B 79:134513, 2009) the mechanism of resistive transition of MgB2 films has been investigated by the analysis of the non-stationary noise produced during the transition process. The developed model suggested that when the transition occurs very near to T C at low bias current, amixed state, consisting of normal and superconductive domains, takes place. Adifferent model based on fluxoids dynamics, generated by the current and/or by an external field, is appropriate when the transition occurs at strong bias currents and temperatures much lower thanT C. The purpose of this paper is a further investigation of the transition process at low bias currents by analyzing the 1/f power spectra of the noise, taken in stationary conditions at different values of the specimen resistance. These spectra, when renormalized to represent the relative fluctuation of the specimen resistance, are practically coincident, afact in agreement with the developed model. Springer Science+Business Media, LLC, 2010 Superconducting transition nationallicence Stationary noise nationallicence Thin films nationallicence MgB2 nationallicence Monticone E. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135, Torino, Italy aut Portesi C. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135, Torino, Italy aut Taralli E. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135, Torino, Italy aut Rajteri M. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135, Torino, Italy aut Andreoli V. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135, Torino, Italy aut Gandini C. Dipartimento di Scienze e Tecnologie Avanzate,—Centro Interdisciplinare Nano-SISTEMI, Università del Piemonte Orientale ‘Amedeo Avogadro', Viale Michel 11, 15121, Alessandria, Italy aut Masoero A. Dipartimento di Scienze e Tecnologie Avanzate,—Centro Interdisciplinare Nano-SISTEMI, Università del Piemonte Orientale ‘Amedeo Avogadro', Viale Michel 11, 15121, Alessandria, Italy aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 1111-1115 1557-1939 24:1-2<1111 2011 24 10948 https://doi.org/10.1007/s10948-010-1056-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1056-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Monticone E. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135, Torino, Italy aut NATIONALLICENCE 700 1- Portesi C. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135, Torino, Italy aut NATIONALLICENCE 700 1- Taralli E. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135, Torino, Italy aut NATIONALLICENCE 700 1- Rajteri M. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135, Torino, Italy aut NATIONALLICENCE 700 1- Andreoli V. Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135, Torino, Italy aut NATIONALLICENCE 700 1- Gandini C. Dipartimento di Scienze e Tecnologie Avanzate,—Centro Interdisciplinare Nano-SISTEMI, Università del Piemonte Orientale ‘Amedeo Avogadro', Viale Michel 11, 15121, Alessandria, Italy aut NATIONALLICENCE 700 1- Masoero A. Dipartimento di Scienze e Tecnologie Avanzate,—Centro Interdisciplinare Nano-SISTEMI, Università del Piemonte Orientale ‘Amedeo Avogadro', Viale Michel 11, 15121, Alessandria, Italy aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 1111-1115 1557-1939 24:1-2<1111 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer