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Isotope effect on the Verwey transition temperature of magnetite
Author(s) -
Terukov E. I.,
Reichelt W.,
Ihle D.,
Oppermann H.
Publication year - 1979
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.2220950219
Subject(s) - charge ordering , magnetite , condensed matter physics , kinetic isotope effect , electron , charge (physics) , transition temperature , phonon , condensation , isotope , materials science , chemistry , superconductivity , thermodynamics , physics , atomic physics , quantum mechanics , metallurgy , deuterium
Electrical resistance and DTA measurements on single crystals of Fe 3 O 4 , in which the oxygen is partially replaced by the stable isotope 18 O, show a positive isotope shift in the Verwey transition temperature T V of δT V = (6.1 ± 0.05) K for the 18 O concentration of 43%. This result can be qualitatively explained by a theory which is based on the concept of the condensation of a coupled charge density–phonon mode at T V and takes into account both the electron–phonon and the electron–electron interactions.