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Detailed Study of IR Absorption Spectra of Manganese–Zinc Ferrites
Author(s) -
Katsnelson E. Z.,
Karoza A. G.,
Meleshchenko L. A.,
Pankov V. V.,
Khavkin B. G.
Publication year - 1987
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.2221410227
Subject(s) - ferrite (magnet) , zinc , manganese , spectral line , spinel , infrared spectroscopy , absorption spectroscopy , ion , analytical chemistry (journal) , absorption band , absorption (acoustics) , materials science , chemistry , crystallography , physics , optics , metallurgy , organic chemistry , chromatography , astronomy , composite material
IR absorption spectra of the Mn 1− x Zn x Fe 2 O 4 ferrite‐spinel system are investigated in the frequency range ν = 800 to 40 cm −1 . The spectra of the second derivative d 2 T /dν 2 are obtained from the computer processed experimental transmission spectra ( T ). On their basis the two complex bands ν 1 and ν 2 of the IR spectra are resolved into three and four components, respectively (for zinc ferrite — into three) and for the band ν 3 — into two components. From the concentration dependences of the bands ν m ( n ) ( m, n = 1, 2, 3, 4) it is concluded that the vibrations, the frequencies of which are independent of zinc ferrite concentration in certain ranges x , correspond to those of separate bonds MnO, ZnO, FeO i.e. they are characteristic with respect to frequency. The spectra of the spinels investigated are analyzed in accord with the irreducible representations of the point group F 4 3 m(T d 2 ). Small tetrahedral structure distortions due to higher covalency of the ZnO bonds and the availability of the Jahn‐Teller ions are considered.