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Giant Thermoelectric Power in Co/Al 2 O 3 Ferromagnetic Nanocomposites Below Percolation Threshold
Author(s) -
Lashkarev G. V.,
Radchenko M. V.,
Bugaiova M. E.,
Baibara O. E.,
Dmitriev A. I.,
Knoff W.,
Story T.,
Foltyn M.,
Krushynskaya L. A.,
Stelmakh Y. A.
Publication year - 2017
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201700153
Subject(s) - percolation threshold , materials science , condensed matter physics , nanocomposite , seebeck coefficient , percolation (cognitive psychology) , thermoelectric effect , ferromagnetism , percolation theory , atmospheric temperature range , conductivity , electrical resistivity and conductivity , nanotechnology , composite material , thermodynamics , thermal conductivity , physics , quantum mechanics , neuroscience , biology
In nanocomposite layers consisting of Co nanoparticles in Al 2 O 3 matrix the thermoelectric power was studied in a wide range of Co content. These layers revealed the giant thermoelectric power in a magnetic field for Co content below percolation threshold. This unusual phenomenon has been explained by hopping electron transport through the media which consist of both, nonmagnetic and magnetic centers in the conditions of temperature gradient.