Magnetic Behavior of Yttrium-Iron-Garnet Nanoparticles Dispersed in Glass Composites
S Taketomi, Robert D. Shull
By absorbing amorphous yttrium iron garnet (YIG) nanoparticles into nanosized pores of a controlled pore glass (CPG) followed by heat treatment, we synthesized YIG nanocrystal-dispersed glass composites. In a sample which was prepared with CPG of 300 nm pore size and heat-treated at 800 degrees C for 2 hours, almost all the amorphous YIG nanoparticles transformed to YIG nanocrystals. The amount of YIG was estimated to be 4.74 weight % from the measured saturation magnetization. In a sample which was prepared from CPG of 49nm pore size with the same heat-treatment, the amount of YIG was estimated to be only 0.538 weight %. Mangetization measurements of differently heat-treated samples revealed that the HIG particles reacted with the SiO2 of the CPG and decomposed into paramagnetic materials. However, the presence of a small amount of unreacted YIG in those samples is implied by their large initial magnetic susceptibilities.
Journal of Applied Physics
91 No. 10
controlled poreglass (CPG), x-ray diffraction, yttrium iron garnet (YIG)
and Shull, R.
Magnetic Behavior of Yttrium-Iron-Garnet Nanoparticles Dispersed in Glass Composites, Journal of Applied Physics
(Accessed June 9, 2023)