Calculation of the diffusion coefficient of Au in Bi-2223 superconductors

Basit Öğe Kaydı
dc.authorid0000-0003-4121-9343en_US
dc.authorid0000-0002-0391-5551en_US
dc.contributor.authorÖztürk, Özgür
dc.contributor.authorKüçükömeroğlu, Tayfun
dc.contributor.authorTerzioğlu, Cabir
dc.date.accessioned2021-06-23T19:19:59Z
dc.date.available2021-06-23T19:19:59Z
dc.date.issued2007
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractUndoped Bi-2223 samples were prepared using a conventional solidstate reaction method. Doping of Au in Bi-2223 was carried out by means of diffusion from an evaporated Au film on pellets. We have investigated the effect of Au diffusion and diffusion-annealing duration on the microstructure and superconducting properties of Au-doped samples by performing x-ray diffraction (XRD), scanning electron microscopy (SEM), dc resistivity and critical current density measurements. Gold diffusion in Bi1.8Pb0.35Sr1.9Ca2.1Cu3Oy has been studied over the temperature range 500-800 degrees C using the technique of successive removal of thin layers and the measurements of lattice parameters from XRD patterns at room temperature. The diffusion doping of Bi-2223 by Au causes a significant increase of the lattice parameter c by about 0.19%. This observation is used for calculation of the Au diffusion coefficient in Bi-2223. The Au diffusion coefficient decreases as the diffusion-annealing temperature decreases. The temperature dependence of the Au diffusion coefficient in the range 500-800 degrees C is described by the relation D = 4.4 x 10(-4) exp(-1.08 eV/ k(B)T). Au doping of the sample increased the critical transition temperature and the critical current density from 100 +/- 0.2 to 104 +/- 0.2 K and from 40 to 125 A cm(-2), in comparison with those of undoped samples. The critical transition temperature and critical current density of Au-doped samples increased with increasing diffusion-annealing time from 10 to 50 h. Au doping of the sample also improved the surface morphology and increased the high-T-c phase ratio. The possible reasons for the observed improvement in superconducting properties of the samples due to Au diffusion are discussed.en_US
dc.identifier.doi10.1088/0953-8984/19/34/346205
dc.identifier.issn0953-8984
dc.identifier.issn1361-648X
dc.identifier.issue34en_US
dc.identifier.scopus2-s2.0-34547284118en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1088/0953-8984/19/34/346205
dc.identifier.urihttps://hdl.handle.net/20.500.12491/6040
dc.identifier.volume19en_US
dc.identifier.wosWOS:000248186000007en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorÖztürk, Özgür
dc.institutionauthorTerzioğlu, Cabir
dc.language.isoenen_US
dc.publisherIop Publishing Ltden_US
dc.relation.ispartofJournal Of Physics-Condensed Matteren_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBi-2223 Superconductorsen_US
dc.titleCalculation of the diffusion coefficient of Au in Bi-2223 superconductorsen_US
dc.typeArticleen_US

Dosyalar

Orijinal paket
Listeleniyor 1 - 1 / 1
Küçük Resim Yok
İsim:
ozgur-ozturk-6040.pdf
Boyut:
1.22 MB
Biçim:
Adobe Portable Document Format
Açıklama:
Tam metin/Full text
İndir

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Fizik Bölümü Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu