Naslov
Anisotropy of critical fields in HgBa2CuO4+delta

Autori
Požek, Miroslav ; Grbić, Mihael Srđan ; Dulčić, Antonije ; Barišić, Neven ; Li, Yuan ; Zhao, Xudong ; Dressel, Martin ; Greven, Martin

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
429. WE-Heraeus-Seminar Microwaves for Condensed Matter Physics 2009 / Scheffler, Marc ; Dressel, Martin - Bad Honnef : Wilhelm und Else Heraeus-Stiftung, 2009

Skup
429. WE-Heraeus-Seminar Microwaves for Condensed Matter Physics 2009

Mjesto i datum
Bad Honnef, Njemačka, 05.07.2009. - 08.07.2009

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
microwaves; cuprate superconductors; aisotropy
(429. WE-Heraeus-Seminar Microwaves for Condensed Matter Physics 2009)

Sažetak
Microwave absorption measurements have proven to be a useful tool for the determination of upper critical fields in high-Tc superconductors, even beyond the experimentally reachable dc magnetic fields. The analysis is usually based on the model for effective microwave conductivity in the mixed state of type-II superconductors, which takes into account vortex pinning mechanisms. Here we show microwave measurements of ab- and c-axis conductivity, which is particularly sensitive if the proper sample geometry is chosen. As an example, we have taken a high quality single crystal of HgBa2CuO4+delta, which can be considered as the model single-layered high-Tc superconductor known for its unique property to confine extrinsic disorder away from the superconducting layer. The upper critical fields are determined in two orientations (Bdc || c-axis and Bdc || ab-plane), and the anisotropy is extracted.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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