La0.67Ba0.33Mn1-xNixO3 with x = 0.0; 0.1; 0.2; 0.4 were prepared from powder of La2O3, BaCO3, MnCO3, and NiO by the solid-state reaction method. All the powder is mixed by using Planetary Ball Milling for 25 hours. After that, all the samples are compacted, calcinatedat 800°C for 10 hours and sintered 1350°C for 20 hours. Phase identification was carried out by using XRD spectrometer and refined by using High Scorer Plus. The results showed that La0.67Ba0.33Mn1-xNixO3 were single phases for all x compositions. The crystal structureswereorthorhombic. The resistivity and magnetoresistance (MR) properties were evaluated by using FPP (Four Points Probe) method, while magnetization was measured by using permagraph spectrometer. From the magnetoresistance results, we observed that the samples showed different sensitivity's responds for each x value. By increasing of x values, the magnetoresistances tend to change from negative magnetoresistance to positive magnetoresistance. Besides, the sensitivity's responds of magnetoresistance were increased by increasing the x values. The highest sensitivity was for x = 0.4. The permeagraph results showed that all the samples were paramagnetic at room temperature due to substitution of Ni. We concluded that the doping of Ni gives effect to the resistivity and magnetoresistance of the samples and also to the sensitivity's responds as a candidate of magnetoresistance sensor's material.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 20 Sept 2018|
|Event||9th Seminar on Magnetic Materials, SMM 2015 - Palembang, South Sumatera, Indonesia|
Duration: 19 Oct 2015 → 21 Oct 2015