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Charge Carrier Transfer in Ferrite Spinels Affected by Magnetic Ordering
Author(s) -
Berzhanskii V. N.,
Evstafev I. I.,
Ivanov V. I.
Publication year - 1990
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.2221580225
Subject(s) - manganese , conductivity , materials science , atmospheric temperature range , nickel , analytical chemistry (journal) , electrical resistivity and conductivity , ferrite (magnet) , condensed matter physics , metallurgy , chemistry , thermodynamics , composite material , electrical engineering , physics , chromatography , engineering
The temperature dependences of the conductivity of single crystals of nickel‐zink Ni 0.39 Zn 0.61 Fe 2.00 O 4 ( T c = 380 K) and manganese‐zink Mn 0.66 Zn 0.27 Fe 2.07 O 4 (T c = 464 K) ferrites are studied in the temperature range 78 to 550 K. Measurements of thermoelectromotive force show that all the samples investigated have n‐type conductivity. In the region of the phase transition to the magnetically‐ordered state the logarithm of conductivity depends anomalously on the inverse temperature with increasing conductivity.