The influence of sintering temperature on the crystal structure, electric and magnetic properties of Ba(2-X)Nd(X)Fe2O5 composite

Patricius Purwanto, Yunasfi Yunasfi, Ade Mulyawan

Abstract


Magnetic composite material of Ba(2-x)Nd(x)Fe2O5 is used to make electromagnetic wave absorbers. The Ba(2-x)Nd(x)Fe2O5 (x = 0 and 0.1) system was synthesized by using solid state reaction method. The Ba(2-x)Nd(x)Fe2O5 system was made with mixture compound of BaCO3, Nd2O3 and Fe2O3 powders with a specific weight ratio, then continued to the milling process and heat treatment at different sintering temperatures. XRD (X-ray diffraction) was conducted for phase identification and to determination of the crystallite size and strain. The study on dielectric and magnetic properties was carried out by using LCR meter and VSM (vibrating sample magnetometer), respectively. The XRD results indicated that the main phase of Ba2Fe2O5 was best resulted at 1000 0C. Dielectric properties, such as AC conductivity and permittivity as a function of the frequency were studied for those best resulted samples. It is found that the substitution of Nd3+ enhances both of the AC conductivity and permittivity due to the changes of the charge carriers (so) and the hoping electron between Fe2+ and Fe3+ ions in the doped system. The M-H curves as the results of the magnetic measurement showed the sharp enhancement of the coercivity (Hc) and the slight reduction in the saturation magnetization (Ms) along with the substitution of the Nd3+.


Keywords


Ba(2-x)Nd(x)Fe2O5, X-ray diffraction, Williamson-hall method, AC conductivity, permittivity, magnetic property

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DOI: https://doi.org/10.11113/mjfas.v15n3.1176

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