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Microwave absorption in high-T c superconductors (1988)

Rachford, F. J. ; Fuller, W. W. ; Osofsky, M. S.

Springer

Journal of superconductivity 1 (1988), S. 165-174

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ISSN: 1572-9605

Keywords: microwave ; surface impedance ; highT c ; La2CuO4 ; YBa2Cu3O7

Source: Springer Online Journal Archives 1860-2000

Topics: Electrical Engineering, Measurement and Control Technology , Physics

Notes: Abstract We have investigated the 9- and 10-GHz microwave properties of bulk samples of strontium and barium substituted La2CuO4 and YBa2Cu3O7 and one YBa2Cu3O7 MBE film on SrTiO3. Anomalous microwave absorption is seen especially for poorly compacted bulk ceramic samples. Transitions were generally broadened nearT c and the residual losses were high. The real part of the surface impedance could be fit belowT c to the empirical equation with an added term linear in temperature. The microwave response of the film was masked by paraelectric absorption and acoustic resonances in the substrate.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00617660

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Measurements ofH c2(T) in Bi-Sr-Cu-O (1994)

Osofsky, M. S. ; Soulen, R. J. ; Wolf, S. A. ; [et al.]

Springer

Journal of superconductivity 7 (1994), S. 279-282

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ISSN: 1572-9605

Keywords: Upper critical field ; BiSrCuO ; anomalous critical field ; H c2(T)

Source: Springer Online Journal Archives 1860-2000

Topics: Electrical Engineering, Measurement and Control Technology , Physics

Notes: Abstract H c2(T) has been measured for thin BSCO films at temperatures down to 65 mK and pulsed fields up to 35 T.H c2(T) diverged anomalously as the temperature decreased. At the lowest temperature, it was five times that expected for a conventional superconductor.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00724552

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Magneto-transport and magnetism in single crystal Pr1Ba2Cu3O7−δ (1995)

Browning, V. M. ; Osofsky, M. S. ; Soulen, R. J. ; [et al.]

Springer

Journal of superconductivity 8 (1995), S. 605-606

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ISSN: 1572-9605

Keywords: Pr ; Pr-Ba-Cu-O ; magnetotransport ; magnetization

Source: Springer Online Journal Archives 1860-2000

Topics: Electrical Engineering, Measurement and Control Technology , Physics

Notes: Abstract The results of magnetoresistance and magnetization measurements taken on a single crystal of PrBa2Cu3O7−δ are reported. Among the family of materials known as the 1-2-3 compounds, only Pr 1-2-3 exhibits non-metallic transport and is not superconducting. Our results suggest that hybridization of Pr orbitals with Cu-O valence states may be responsible for the nonmetallic transport properties of Pr 1-2-3.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00727438

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