Superparamagnetism in Magnetically Dilute Systems

Citations Over TimeTop 25% of 1964 papers

Abstract

Superparamagnetic behavior observed in magnetically dilute systems is discussed. The clusters that behave like superparamagnetic fine particles are ferromagnetic or ferrimagnetic regions separated magnetically from the matrix, because these regions are surrounded by nonmagnetic atoms. The magnetic properties of dilute oxide systems such as: 0.9 ZnFe2O4-0.1 NiFe2O4; 0.9 FeTiO3-0.1 Fe2O3; and Y1.5Ca1.5Fe4.5Sn1.5O12 are better understood if we take into account the existence of the superparamagnetic clusters. The Langevin function type magnetization curves observed for the Fe—Cr alloys in the composition range where ferromagnetism just disappears, however, were found not to have the characteristics of superparamagnetism, although superparamagnetic clusters are predicted by the localized model.

Related Papers

• → Surface effects and magnetic ordering in few-nanometer-sized ε-Fe2O3 particles(2013)37 cited
• → Synthesis of superparamagnetic Mn3O4 nanocrystallites by ultrasonic irradiation(2005)54 cited
• → On the magnetic properties of nanosized CoFe2O4(1999)30 cited
• → Superparamagnetic and ferrimagnetic behavior of nanocrystalline ZnO(MnO)(2017)6 cited
• → Superparamagnetism and ferrimagnetism in the Sr2FeMoO6–δ nanoscale powder(2022)3 cited