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

• Authors: V. Laguta , M. Marysko , V. Stephanovich , I. Raevsky , N. Olekhnovich , A. Pushkarev , Yu. Radyush , S. Raevskaya , R. Kuzian , V. Chlan , H. Štěpánková
• Languages of publication: EN

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.

Keywords

EN

Multiferroics; Superconductivity; magnetic susceptibility

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 6
• Pages: 1534-1539

Dates

published

2017-06

received

2016-11-29

(unknown)

2017-04-04

Contributors

author

V. Laguta

• Institute of Physics AS CR, Cukrovarnicka 10, 162 53 Prague, Czech Republic
• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

M. Marysko

• Institute of Physics AS CR, Cukrovarnicka 10, 162 53 Prague, Czech Republic

author

V. Stephanovich

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

I. Raevsky

• Research Institute of Physics and Faculty of Physics, Southern Federal University, Stachki Ave. 194, 344090, Rostov-on-Don, Russia

author

N. Olekhnovich

• Scientific-Practical Materials Research Centre, NASB, Minsk, Belarus

author

A. Pushkarev

• Scientific-Practical Materials Research Centre, NASB, Minsk, Belarus

author

Yu. Radyush

• Scientific-Practical Materials Research Centre, NASB, Minsk, Belarus

author

S. Raevskaya

• Research Institute of Physics and Faculty of Physics, Southern Federal University, Stachki Ave. 194, 344090, Rostov-on-Don, Russia

author

R. Kuzian

• Institute for Problems of Materials Science, National Academy of Sciences of Ukraine Krjijanovskogo 3, 03142 Kyiv, Ukraine

author

V. Chlan

• Charles University in Prague, Faculty of Mathematics and Physics, Prague 1, Czech Republic

author

H. Štěpánková

• Charles University in Prague, Faculty of Mathematics and Physics, Prague 1, Czech Republic

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Identifiers

DOI

10.12693/APhysPolA.131.1534