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2017 | 131 | 6 | 1534-1539
Article title

Cluster Superconductivity in the Magnetoelectric Pb(Fe_{1/2}Sb_{1/2})O₃ Ceramics

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Abstracts
EN
We report the observation of cluster (local) superconductivity in the magnetoelectric Pb(Fe_{1/2}Sb_{1/2})O₃ ceramics prepared at a hydrostatic pressure of 6 GPa and temperatures 1200-1800 K to stabilize the perovskite phase. The superconductivity is manifested by an abrupt drop of the magnetic susceptibility at the critical temperature T_{c} ≈7 K. Both the magnitude of this drop and T_{c} decrease with magnetic field increase. Similarly, the low-field paramagnetic absorption measured by EPR spectrometer drops significantly below T_{c} as well. The observed effects and their critical magnetic field dependence are interpreted as manifestation of the superconductivity and the Meissner effect in metallic Pb nanoclusters existing in the ceramics. Their volume fraction and average size were estimated as 0.1-0.2% and 140-150 nm, respectively. The superconductivity related effects disappear after oxidizing annealing of the ceramics.
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Year
Volume
131
Issue
6
Pages
1534-1539
Physical description
Dates
published
2017-06
received
2016-11-29
(unknown)
2017-04-04
Contributors
author
  • Institute of Physics AS CR, Cukrovarnicka 10, 162 53 Prague, Czech Republic
  • Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland
author
  • Institute of Physics AS CR, Cukrovarnicka 10, 162 53 Prague, Czech Republic
  • Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland
author
  • Research Institute of Physics and Faculty of Physics, Southern Federal University, Stachki Ave. 194, 344090, Rostov-on-Don, Russia
  • Scientific-Practical Materials Research Centre, NASB, Minsk, Belarus
author
  • Scientific-Practical Materials Research Centre, NASB, Minsk, Belarus
author
  • Scientific-Practical Materials Research Centre, NASB, Minsk, Belarus
author
  • Research Institute of Physics and Faculty of Physics, Southern Federal University, Stachki Ave. 194, 344090, Rostov-on-Don, Russia
author
  • Institute for Problems of Materials Science, National Academy of Sciences of Ukraine Krjijanovskogo 3, 03142 Kyiv, Ukraine
author
  • Charles University in Prague, Faculty of Mathematics and Physics, Prague 1, Czech Republic
  • Charles University in Prague, Faculty of Mathematics and Physics, Prague 1, Czech Republic
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv131n621kz
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