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Direct measurement of the London penetration depth in YBa2Cu3O6.92 using low-energy μSR


Kiefl, R F; Hossain, M D; Wojek, B M; Dunsiger, S R; Morris, G D; Prokscha, T; Salman, Z; Baglo, J; Bonn, D A; Liang, R; Hardy, W N; Suter, A; Morenzoni, E (2010). Direct measurement of the London penetration depth in YBa2Cu3O6.92 using low-energy μSR. Physical Review. B, Condensed Matter and Materials Physics, 81(18):180502.

Abstract

A direct measurement of the London penetration depth in the high-Tc superconductor YBa2Cu3O6.92 has been made using low-energy μSR with an effective background suppression method. The average magnetic field versus mean depth was measured in the Meissner state of high-purity detwinned crystals of YBa2Cu3O6.92. The resulting magnetic field profiles along the a and b axes are consistent with a local London model beyond 10 nm but there are deviations close to the surface. The absolute values of λa and λb extrapolated to zero temperature are 126.1±1.2±3 and 105.5±1.0±3 nm, respectively. These results are compared with other less direct methods and extend the use of low-energy μSR to small crystals.

© 2010 The American Physical Society

Abstract

A direct measurement of the London penetration depth in the high-Tc superconductor YBa2Cu3O6.92 has been made using low-energy μSR with an effective background suppression method. The average magnetic field versus mean depth was measured in the Meissner state of high-purity detwinned crystals of YBa2Cu3O6.92. The resulting magnetic field profiles along the a and b axes are consistent with a local London model beyond 10 nm but there are deviations close to the surface. The absolute values of λa and λb extrapolated to zero temperature are 126.1±1.2±3 and 105.5±1.0±3 nm, respectively. These results are compared with other less direct methods and extend the use of low-energy μSR to small crystals.

© 2010 The American Physical Society

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Additional indexing

Other titles:Direct measurement of the London penetration depth in YBa_{2}Cu_{3}O_{6.92} using low-energy μSR
Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2010
Deposited On:16 Feb 2011 13:31
Last Modified:05 Apr 2016 14:47
Publisher:American Physical Society
ISSN:1098-0121
Publisher DOI:https://doi.org/10.1103/PhysRevB.81.180502

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