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Transport Phenomena of Ferroelectric Solid Solutions (GeTe) 1− x ((Ag 2 Te) 1− y (Sb 2 Te 3 ) y ) x with y = 0.60, 0 ≦ x ≦ 1 at 300 K
Author(s) -
Christakudis G. Ch.,
Plachkova S. K.,
Avilov E. S.,
Shelimova L. E.,
Abrikosov N. Kh.
Publication year - 1985
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.2221270144
Subject(s) - seebeck coefficient , ferroelectricity , electrical resistivity and conductivity , brillouin zone , hall effect , solid solution , materials science , analytical chemistry (journal) , condensed matter physics , conductivity , thermal conductivity , mineralogy , chemistry , physics , dielectric , optoelectronics , chromatography , quantum mechanics , metallurgy , composite material
Abstract The variation of the transport coefficients at 300 K, Seebeck coefficient (α), specific resistivity or conductivity (ϱ = I/s̀), Hall coefficient ( R H ), and thermal conductivity ( K ) with the composition ( x ) for solid solution (GeTe) 1− x ((Ag 2 Te) 1− y (Sb 2 Te 3 ) y ) x ) with y = 0.60 is investigated. The Hall coefficient decreases, reaches at x = 0.40 the minimal value and increases then up to x = 1, but the variation of the other transport coefficients are monotonous with composition: α and ε increase but K decreases with composition. The results are interpreted qualitatively on the base of the band edge model of GeTe with splitting of the L‐ and ∑‐valleys of the Brillouin zone (BZ) at the ferroelectric O h –C 3v phase transition and the complicated form of the surfaces of constant energy.