Synthesis and Mossbauer studies of mesoporous γ-Fe2O3

• Autorzy: Kotsyubynsky V O , Moklyak V V , Hrubiak A B

Identyfikatory

DOI

10.2478/s13536-014-0202-4

• Języki publikacji: EN

Abstrakty

EN

A method of synthesis of mesoporous γ-Fe2O3 by thermal decomposition of iron citrate has been proposed. Investigations of the crystalline and magnetic structure of obtained materials were done. Nanodispersed maghemite (γ-Fe2O3) with the sizes of coherent scattering regions of about 4–7 nm consisted of one phase only after gel sintering at 200, 250 and 300 °C. The particles of synthesized materials were both in magnetically ordered, and superparamagnetic states, and they formed a grid-like mesoporous structure. The influence of magnetic dipole interparticle interaction on the parameters of Mossbauer spectra was observed. A phenomenological model of the differences between nanodispersed γ-Fe2O3 magnetic microstructures obtained after annealing at different temperatures was presented.

Słowa kluczowe

EN

g-Fe2O3; mesoporous structure; Mössbauer spectroscopy; superparamagnetic properties

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2014
• Tom: Vol. 32, No. 3
• Strony: 481--486
• Opis fizyczny: Bibliogr. 15 poz., rys., wykr., tab.

Twórcy

autor

Kotsyubynsky V O

• Vasyl Stefanyk Precarpathian National University, 57 Shevchenko Str., Ivano-Frankivsk, 76025, Ukraine

autor

Moklyak V V

• Institute of Metal Physics, National Academy of Science, 36 Acad. Vernadsky Boulevard., Kyiv, 03680, Ukraine

autor

Hrubiak A B

• Vasyl Stefanyk Precarpathian National University, 57 Shevchenko Str., Ivano-Frankivsk, 76025, Ukraine

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