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Ramos Guivar, J.A., Bustamante, A., Flores, J., Mejía Santillan, M., Osorio, A.M., Martínez, A.I., De Los Santos Valladares, L. and Barnes, C.H. (2014) Mossbauer Study of Intermediate Superparamagnetic Relaxation of Maghemite (γ-Fe2O3) Nanoparticles. Hyperfine Interactions, 224, 89-97.
http://dx.doi.org/10.1007/s10751-013-0864-z

has been cited by the following article:

• TITLE: Structural and Magnetic Properties of Monophasic Maghemite (γ-Fe2O3) Nanocrystalline Powder

  AUTHORS: Juan Adrián Ramos Guivar, Arturo Isaías Martínez, Ana Osorio Anaya, Luis De Los Santos Valladares, Lizbet León Félix, Angel Bustamante Dominguez

  KEYWORDS: Monophasic Nanomaghemite, Rietveld Refinement, TEM, SAED, M-H Loops, ZFC

  JOURNAL NAME: Advances in Nanoparticles, Vol.3 No.3, August 28, 2014

  ABSTRACT: Structural and magnetic studies of monophasic maghemite (γ-Fe2O3) magnetic nanocrystallites (MNCs) synthesized by the co-precipitation chemical route are reported in this paper. For the synthesis, a starting precursor of magnetite (Fe3O4) in basic medium was oxidized at room temperature by adjusting the pH = 3.5 at 80°C in an acidic medium without surfactants. X-ray diffraction (XRD) pattern shows widened peaks indicating nanometric size and Rietveld Refinement confirms only one single-phase assigned to γ-Fe2O3 MNCs. High Resolution Transmission Electron Microscopy (HR-TEM) demonstrates the formation of nanoparticles with diameter around D ≈ 6.8 ± 0.1 nm which is in good agreement with Rietveld Refinement (6.4 ± 1 nm). A selected area electron diffraction pattern was carried out to complement the study of the crystalline structure of the γ-Fe2O3 MNCs. M(H) measurements taken at different temperatures show almost zero coercivity and remanence indicating superparamagnetic domain and high magnetic saturation.