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doctoral thesis
Proučavanje supravodljivih fluktuacija i pseudoprocjepa u visokotemperaturnim supravodičima mikrovalnom metodom
Zagreb: University of Zagreb, Faculty of Science, 2011. urn:nbn:hr:217:392050
Grbić, Mihael
University of Zagreb
Faculty of Science
Department of Physics

Institutional repository: Repository of the Faculty of Science

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Grbić, M. (2011). Proučavanje supravodljivih fluktuacija i pseudoprocjepa u visokotemperaturnim supravodičima mikrovalnom metodom (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:392050

Grbić, Mihael. "Proučavanje supravodljivih fluktuacija i pseudoprocjepa u visokotemperaturnim supravodičima mikrovalnom metodom." Doctoral thesis, University of Zagreb, Faculty of Science, 2011. https://urn.nsk.hr/urn:nbn:hr:217:392050

Grbić, Mihael. "Proučavanje supravodljivih fluktuacija i pseudoprocjepa u visokotemperaturnim supravodičima mikrovalnom metodom." Doctoral thesis, University of Zagreb, Faculty of Science, 2011. https://urn.nsk.hr/urn:nbn:hr:217:392050

Grbić, M. (2011). 'Proučavanje supravodljivih fluktuacija i pseudoprocjepa u visokotemperaturnim supravodičima mikrovalnom metodom', Doctoral thesis, University of Zagreb, Faculty of Science, accessed 23 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:392050

Grbić M. Proučavanje supravodljivih fluktuacija i pseudoprocjepa u visokotemperaturnim supravodičima mikrovalnom metodom [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Science; 2011 [cited 2024 November 23] Available at: https://urn.nsk.hr/urn:nbn:hr:217:392050

M. Grbić, "Proučavanje supravodljivih fluktuacija i pseudoprocjepa u visokotemperaturnim supravodičima mikrovalnom metodom", Doctoral thesis, University of Zagreb, Faculty of Science, Zagreb, 2011. Available at: https://urn.nsk.hr/urn:nbn:hr:217:392050

Metadata
TitleProučavanje supravodljivih fluktuacija i pseudoprocjepa u visokotemperaturnim supravodičima mikrovalnom metodom
Title (english)Investigation of superconducting fluctuations and pseudogap in high temperature superconductors microwave method
AuthorMihael Grbić
MentorMiroslav Požek (mentor)
Committee memberSlaven Barišić (predsjednik povjerenstva)
Committee memberMiroslav Požek (član povjerenstva)
Committee memberMladen Prester (član povjerenstva)
Committee memberIvo Batistić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Physics)
Zagreb
Defense date and country2011-02-02, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Universal decimal classification
(UDC)		53 - Physics
Abstract
U ovom radu je tehnikom mikrovalne apsorpcije proučavan doprinos fluktuacijske vodljivosti na temperaturama iznad temperature supravodljivog prijelaza (Tc) u trima porodicama kuprata - YBa2Cu3O6+x, HgBa2CuO4+δ i La2−xSrxCuO4. Iz izračunatih vrijednosti σab(c) određen je raspon temperaturnog prostiranja fluktuacija ab(c)T′. Diskutirana je ovisnost ab(c)T′ o dopiranju i kakve implikacije ono nosi obzirom na trenutna teorijska predviđanja o supravodljivim fluktuacijama i pseudoprocjepu. Za potrebe rada su izračunate raspodjele polja za modove eliptične cilindrične šupljine, raspodjela polja u beskonačno dugom pravokutnom anizotropnom uzorku, te je napravljen jednodimenzionalni numerički model za nelinearno širenje topline. Također, izrađeni su novi dijelovi eksperimentalnog postava kako bi se osigurala bolja stabilnost mjerenja, te su analizirana ranija mjerenja na uzorku Bi2Sr2CaCu2O8+δ.
Abstract (english)
We study the response of superconducting fluctuations by microwave absorption technique, above the transition temperature (Tc) in three families of cuprates - YBa2Cu3O6+x, HgBa2CuO4+δ and La2−xSrxCuO4. From the calculated values of σab(c) with and without applied magnetic field we determine the temperature span of fluctuations ab(c)T′. The doping dependence of ab(c)T′(p) and the implications of the measured data are discussed. Obtained results are compared with current theoretical and experimental findings on superconducting fluctuations and pseudogap. Within the scope of the thesis we calculated the electromagnetic field distributions of our resonating cavity, magnetic field distribution in an infinite rectangular anisotropic rod, and developed a numerical model for one−dimensional nonlinear heat propagation. Also, new parts of the measurement setup were made to ensure a better stability of the measurement process, and earlier measurements of Bi2Sr2CaCu2O8+δ were analyzed.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:392050
Study programmeTitle: Physics
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje fizika (doktor/doktorica znanosti, područje prirodnih znanosti, polje fizika)
Type of resourceText
Extent145 str.
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2017-08-23 11:55:42