Mössbauer and optical investigation of Co3−xFexO4 thin films grown by sol–gel process

Structural transformation and the related variation in magnetic and optical properties of Co3−xFexO4 thin films grown by a sol–gel method have been investigated as the Fe composition varies up to x = 2. The normal spinel phase is dominant below x = 0.55 and the inverse spinel phase grows as x increa...

Full description

Saved in:
Bibliographic Details
Published inHyperfine interactions Vol. 169; no. 1-3; pp. 1363 - 1369
Main Authors Kim Kwang Joo, Kim Hee Kyung, Park, Young Ran, Ahn Geun Young, Sung, Kim Chul, Park, Jae Yun
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.04.2006
Subjects
Absorption spectra
Cobalt
Composition
Ferric ions
Ferrous ions
Magnetic properties
Mossbauer spectroscopy
Optical properties
Sol-gel processes
Spectroellipsometry
Spectrum analysis
Spinel
Thin films
Online AccessGet full text

Cover

More Information
Summary:Structural transformation and the related variation in magnetic and optical properties of Co3−xFexO4 thin films grown by a sol–gel method have been investigated as the Fe composition varies up to x = 2. The normal spinel phase is dominant below x = 0.55 and the inverse spinel phase grows as x increases further. Conversion electron Mössbauer spectroscopy (CEMS) measurements indicate that the normal spinel phase have octahedral Fe3+ ions mostly while the inverse spinel phase contain octahedral Fe2+ and tetrahedral Fe3+ ions. For higher Fe composition (x > 1.22), Co2+ ions are found to substitute the octahedral Fe2+ sites. The measured optical absorption spectra for the Co3−xFexO4 films by spectroscopic ellipsometry support the CEMS interpretation.
ISSN:0304-3843
1572-9540
DOI:10.1007/s10751-006-9452-9