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- W1857213172 abstract "Ferromagnetic nanoparticles when dispersed in a dielectric ceramic matrix offer a new series of percolation composites with a metal-semiconductor or insulator interface that tailors the functional properties. In this purview, ZrO 2 of a high dielectric constant (ε r ) is stabilized in a cubic (c) polymorph by incorporating CrO 2 of strongly ferromagnetic nanoparticles. A selective composition 20 CrO 2 –80ZrO 2 is synthesized after heating a polymer precursor with glycerol at 500°C–800°C in air for 2 h. Broadening of X-ray diffraction peaks reveals Cr 4+ :c-ZrO 2 with an average crystallite size 5 nm in the 500°C heated sample and that is grown to 8 nm on increasing the temperature to 800°C. They occur as bundles of thin platelets in electron microscopic images. Both the samples have ferromagnetic hysteresis loops with 794 and 211 Oe of coercivities, respectively. Variations of ε r -value and the power loss are studied as a function of frequency f (50 Hz–100 kHz range) on cold-pressed pellets at selective temperatures, in the 30°C–500°C range, in describing the effects of the magnetic species." @default.
- W1857213172 created "2016-06-24" @default.
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- W1857213172 date "2011-08-01" @default.
- W1857213172 modified "2023-09-26" @default.
- W1857213172 title "SYNTHESIS OF CrO2 MODIFIED c-ZrO2 OF FERROMAGNETIC NANOCOMPOSITE PARTICLES" @default.
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- W1857213172 doi "https://doi.org/10.1142/s0219581x11008988" @default.
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