6533b7d8fe1ef96bd1269965

RESEARCH PRODUCT

Cluster superconductivity in the magnetoelectric Pb(Fe1/2Sb1/2)O3 ceramics

I. P. RaevskyMiroslav MaryškoVladimir A. StephanovichV. ChlanN. M. OlekhnovichYu. V. RadyushS. I. RaevskayaR. O. KuzianHelena ŠTěpánkováV. V. LagutaAnatoli V. Pushkarev

subject

SuperconductivityCondensed Matter - Materials ScienceMaterials scienceCondensed matter physicsGeneral Physics and AstronomyMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciences02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesMagnetic susceptibilityvisual_art0103 physical sciencesvisual_art.visual_art_mediumCluster (physics)MultiferroicsCeramic010306 general physics0210 nano-technology

description

We report the observation of cluster (local) superconductivity in the magnetoelectric Pb(Fe1/2Sb1/2)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 TC 7 K. Both the magnitude of this drop and TC decrease with magnetic field increase. Similarly, the low-field paramagnetic absorption measured by EPR spectrometer drops significantly below TC as well. The observed effects and their critical magnetic field dependence are interpreted as manifestation of the superconductivity and 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.

yearjournalcountryeditionlanguage
2016-11-29
10.12693/aphyspola.131.1534http://arxiv.org/abs/1611.09895