Abstract
This research aimed to investigate the structural and magnetic properties of Yttrium Iron Garnet by Ni-doped using self-combustion method. Ni-doped directly changed the structure into Y3Fe5-XNixO12 (x=0.00, 0.02, 0.04, 0.06, 0.08). Self-combustion method was obtained by stirring raw materials at room temperature (27°–28°C) and heated at 150°C until combustion occurred. The samples were sintered at 900°C with 120 minutes holding time. The phase identification revealed the cubic structure of garnet phase with the crystallite size from 62.73–62.87 nm. The molecular bonding from molecular bonding displayed Ni-O and Fe-O bonds, while the magnetic properties shown the highest saturation magnetization of 27.04 emu/g in the sample with additional Ni x=0.02, the highest magnetic remenance of 16.09 in the sample Ni x=0.02, and the highest coercivity of 0.029 in the sample with Ni x=0.08. This research, by adding nickel element, shows that the coercivity of Y3Fe5-XNixO12 decreased when the particle size is increased. The increase in Ni concentration as doping material cause the double exchange interaction and affected the lattice parameter, molecular bond, and magnetic properties.
Highlights
An improvement for a signal processing device is identified in a radar detecting tool, communication, and instrumentation using a microwave device[1]
Combined phase analysis used diffractogram values and data from the Crystallography Open Database (COD) with the database in this study based on COD-Inorg REV248644
K ×λ FWHM × cosθ where D is the mean crystallite size, k (0.89) is the Scherrer constant, λ is X-ray wavelength (0.154252 nm), and β is the relative value of the full width at half maximum (FWHM) of the diffraction peak (402)
Summary
An improvement for a signal processing device is identified in a radar detecting tool, communication, and instrumentation using a microwave device[1]. Microwave devices often use ferrite material due to its high specific resistance, extraordinary magnetic flexibility, price, and performance. A good ferrite material used in microwave devices is yttrium iron garnet (YIG), ferromagnetic, that has high electric resistivity, stable high radiation, and relatively low magnetization. YIG has a general crystal structure of A3B5O12 with the specific formula of Y3Fe5O122,3. Yttrium iron garnet (YIG) is a cubic ferrite material with la3 ̅d structure[4]. Previous research[6] revealed that another material such as nickel (Ni) can be added into yttrium iron garnet (YIG)
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