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2007 | 5 | 1 | 107-117
Tytuł artykułu

Characterization of superparamagnetic MgxZn1−x Fe2O4 powders

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Structural and magnetic properties of Mgx Zn1−x Fe2O4 powders have been studied with respect to the application for thermal cancer therapy (magnetic hyperthermia). Mgx Zn1−x Fe2O4 (x=0.1–0.5) powders with particle sizes between 5 and 8 nm were produced by citrate method. The X-ray diffraction patterns of the samples correspond to a spinel phase. The lattice constant and the volume of the elementary cell increase when x changes from 0.1 to 0.5. The FTIR-spectra ascertain the spinel phase formation. The Mossbauer studies reveal the presence of extremely small particles, which undergo superparamagnetic relaxation at room temperature. The core-shell model has been applied to explain quadruple doublets. The quadruple splitting at “shells” is bigger than those at “cores” whereas the isomer shifts remain close. Magnetic studies confirm the presence of extremely small particles that behave as superparamagnetic ones. [...]
Słowa kluczowe
Wydawca
Czasopismo
Rocznik
Tom
5
Numer
1
Strony
107-117
Opis fizyczny
Daty
wydano
2007-03-01
online
2007-03-01
Twórcy
  • Department Technology of Silicates, University of Chemical Technology and Metallurgy, Sofia, 1756, Bulgaria
  • Department Technology of Silicates, University of Chemical Technology and Metallurgy, Sofia, 1756, Bulgaria
  • Institute of Catalysis, Bulgarian Academy of Science, Sofia, 1113, Bulgaria
autor
  • Institute of Catalysis, Bulgarian Academy of Science, Sofia, 1113, Bulgaria
  • Department of Condensed Matter Physics, Faculty of Physics, Sofia University, Sofia, 1164, Bulgaria
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-006-0069-2
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