Magnetic Properties and Mössbauer Spectroscopy of Fe3O4/CoFe2O4 Nanorods
Autor: | Tim Nowack, Soma Salamon, Heiko Wende, Stefan Heißler, Martin Hähsler, Silke Behrens, Joachim Landers, Michael Zimmermann |
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Rok vydání: | 2020 |
Předmět: |
010405 organic chemistry
Relaxation (NMR) Spinel Analytical chemistry chemistry.chemical_element engineering.material 010402 general chemistry 01 natural sciences 0104 chemical sciences law.invention Inorganic Chemistry symbols.namesake Magnetization chemistry law Mössbauer spectroscopy symbols engineering Nanorod Physical and Theoretical Chemistry Electron microscope Raman spectroscopy Cobalt |
Zdroj: | Inorganic Chemistry. 59:3677-3685 |
ISSN: | 1520-510X 0020-1669 |
Popis: | Fe3O4/CoFe2O4 nanorods were obtained via a simple seed-mediated synthesis. Nanorods were used as seeds to grow CoFe2O4 by thermal codecomposition of the cobalt(II) and iron(III) acetylacetonate precursors. The growth process was monitored by electron microscopy (SEM, TEM), and the resulting nanorods were characterized by powder X-ray diffraction analysis and IR and Raman spectroscopy. Magnetometry and AC susceptometry studies revealed a distribution of Neel relaxation times with an average blocking temperature of 140 K and a high-field magnetization of 42 Am2/kg. Complementarily recorded 57Fe-Mossbauer spectra were consistent with the Fe3O4/CoFe2O4 spinel structure and exhibited considerable signs of spin frustration, which was correlated to the internal and surface structure of the nanorods. |
Databáze: | OpenAIRE |
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