Electrical characteristics of HTS/manganite double layers

• Autorzy: Timur Nurgaliev , Vladimír Štrbík , Snezhanka Miteva , Blagoi Blagoev , Emil Mateev , Lyubomir Neshkov , Štefan Beňačka , Štefan Chromik
• Języki publikacji: EN

Abstrakty

EN

Superconductor/ferromagnetic (SC/FM) Y1Ba2Cu3O7−δ /La0.7Sr0.3MnO3 (YBCO/LSMO) double layers were prepared on LaAlO3 substrates by magnetron sputtering and their electrical and microwave parameters were investigated at 77 K. In the theoretical plan, simple formulas for estimation of the sensitivity of the SC surface impedance to the concentration changes of normal charge carriers were proposed and the surface resistance R S peculiarities of both SC and FM surfaces were described. Thinner YBCO/LSMO structure was characterized by lower SC parameters and higher surface resistance R S at ∼ 4 GHz. The difference of R S of sample SC surfaces was interpreted as due to a difference between the normal charge carrier densities in these samples. R S of the FM surface was higher than that of the SC surface due to the microwave losses of the magnetic subsystem. A peak of the microwave losses, observed in the thicker double layer, was assumed to be caused by uniform FMR in the LSMO film.

Słowa kluczowe

EN

HTS/manganite heterostructure; critical temperature and current density; surface resistance

• Czasopismo: Open Physics
• Rocznik: 2007
• Tom: 5
• Numer: 4
• Strony: 637-649

Daty

wydano

2007-12-01

online

2007-12-01

Twórcy

autor

Timur Nurgaliev

• Institute of Electronics BAS, 72 Tsarigradsko Chausse, 1784, Sofia, Bulgaria,

autor

Vladimír Štrbík

• Institute of Electrical Engineering SAS, Dúbravská cesta 9, 84104, Bratislava, Slovak Republic

autor

Snezhanka Miteva

• Institute of Electronics BAS, 72 Tsarigradsko Chausse, 1784, Sofia, Bulgaria

autor

Blagoi Blagoev

• Institute of Electronics BAS, 72 Tsarigradsko Chausse, 1784, Sofia, Bulgaria

autor

Emil Mateev

• Institute of Electronics BAS, 72 Tsarigradsko Chausse, 1784, Sofia, Bulgaria

autor

Lyubomir Neshkov

• Institute of Electronics BAS, 72 Tsarigradsko Chausse, 1784, Sofia, Bulgaria

autor

Štefan Beňačka

• Institute of Electrical Engineering SAS, Dúbravská cesta 9, 84104, Bratislava, Slovak Republic

autor

Štefan Chromik

• Institute of Electrical Engineering SAS, Dúbravská cesta 9, 84104, Bratislava, Slovak Republic

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Identyfikatory

DOI

10.2478/s11534-007-0036-3