Interference effect between superparamagnetic and spin glass correlated moments in a system of dispersed Co3O4 nanocrystallites

• Published in: Journal of physics. Condensed matter Vol. 21; no. 9; pp. 095303 - 095303 (11)
• Main Authors: Branković, D, Jokanović, V, Babić-Stojić, B, Jagličić, Z, Lisjak, D, Kojić, D
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 04.03.2009; Institute of Physics
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Diamagnetism, paramagnetism and superparamagnetism; Exact sciences and technology; Magnetic properties and materials; Magnetic properties of nanostructures; Physics; Cobalt oxide; Atomic force microscopy; Spin glasses; Particle size; Frequency dependence; Magnetic moments; Superparamagnetism; XRD; Amorphous state; High temperature; Magnetic susceptibility; Spin dynamics; Magnetic particles; Temperature effects; Silicon oxides; Coercive force; Activation energy; Nanocrystal

An inhomogeneous system of aggregates of Co3O4 nanocrystallites dispersed in an amorphous SiO2 matrix has been studied. X-ray diffraction and atomic force microscopy reveal a bimodal distribution of crystallite sizes, smaller nanocrystallites with dimension below 10 nm and larger nanocrystallites of...