Fe82Si8B10 amorphous ribbon which containing 82% of Fe and 18% of B and Si were prepared using rapid solidification technique. The samples were constantly annealed for 1 hour in the temperature range of 350°C-600°C. X-ray diffraction analysis (XRD) displays a large peak which is the diffusion hallow suggesting the amorphousity in its origin and formation of crystalline phase with the increment of annealing temperature at 450oC. The magnetic ordering of the ribbon is determined as temperature functions by both AC and DC magnetization. At 450°C, the saturation magnetization (Ms) was found 143 emu/gm and with better value of real part of initial permeability at 450°C as well as better relative quality factor (RQF) was observed at the same temperature. The results are explained as due to higher heating rates than this Si diffuse in amorphous and lost the soft magnetic properties.
Journal of Engineering Science 13(1), 2022, 1-8
The effect of Y3+ doping on the structural and magnetic properties of Ni0.25 Zn0.75YxFe2-xO4 [x= 0.00, 0.02, 0.04, 0.06 and 0.08] was investigated. The specimen was synthesized by conventional solid state reaction method where the sintering temperature was 1150oC for 3 hours. The structure of the specimens was inspected by XRD pattern and SEM micrographs. The XRD patterns delineate the formation of spinel type cubic structure. The lattice parameters, bulk density, X-ray density and porosity were investigated for all the samples. The SEM micrographs shows that the particles of all the composition are within 0.4 – 1.2 μm. M-H curves at room temperature exhibit the ferromagnetic behavior. The effect of Y3+ causes drastically variation on saturation magnetization (Ms), coercivity (Hc) and remanent magnetization (Mr). Moreover, the M-H curves delineate the soft ferromagnetic phenomenon which can be the reason of the acceptance of the specimen in industrial applications.
Dhaka Univ. J. Sci. 68(2): 111-116, 2020 (July)
e341were 46 (28.2%) aboriginals, 3 (1.8%) incarcerated, and 3 (1.8%) living in a long term care facility. Forty-one (24.0%) were new patients and 83 (48.5%) had treatment failure or relapse. Exclude the new patients of our MDR program, 25 (19.8%) developed both isoniazid and rifampin resistance within one year of starting anti-tuberculosis treatment, and 81 (64.3%) developed resistance after more than two years of treatment. Drug resistance was highest against fluoroquinolone (49%).Conclusion: Having prior treatment with poor compliance was considered the major determinant of developing MDR-TB. However, 24% of our MDR-TB patients were new patients, indicating possible transmission of MDR-TB in Taiwan. Aggressive TB control efforts are needed to prevent further development and spread of MDR-TB.
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