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- 저자 : PrabhakarVattikuti, S.V. (검색결과 1 건)
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Reddy, Ch.Venkata,PrabhakarVattikuti, S.V.,Ravikumar, R.V.S.S.N.,Moon, Sang Jun,Shim, Jaesool Elsevier 2015 Journal of magnetism and magnetic materials Vol.394 No.-
<P><B>Abstract</B></P> <P>Cadmium substituted cobalt ferrite nanoparticles are synthesis using the chemical method. The as-prepared ferrite nanoparticles are calcinated at 300°C and 600°C respectively. The samples are studied using; Powder XRD, SEM with EDX, TEM, FT-IR, TG-DTA and vibrating sample magnetometer (VSM) in order to study the calcination temperature effect on structural, morphological and magnetic properties. The magnetic properties, like saturation magnetization and coercivity increases with increasing the calcination temperature. This enhancement is attributed to the transition from amulti-domain to a single-domain nature. The absorption bands observed at 588cm<SUP>−1</SUP> (<I>ν</I> <SUB>1</SUB>) and 440cm<SUP>−1</SUP> (<I>ν</I> <SUB>2</SUB>) are attributed to the vibrations of tetrahedral and octahedral complexes. The TG-DTA curves reveal the thermal stability of the prepared ferrite nanoparticles. The calcination temperature influences the magnetic properties, surface morphology and crystalline size.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cd<SUB>0.3</SUB>Co<SUB>0.7</SUB>Fe<SUB>2</SUB>O<SUB>4</SUB> nanoparticles synthesized using the chemical co-precipitation. </LI> <LI> The magnetization, coercivity values increases with increasing the calcination temperature. </LI> <LI> The calcination temperature influences the magnetic properties and crystallite size. </LI> <LI> The FTIR spectra results confirmed the vibrations of tetrahedral and octahedral complexes. </LI> </UL> </P>
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