Publication Date:
2018-10-27
Description:
Functional magnetic materials of composition Ni 1 − x Co x Fe 2 O 4 (x = 0, 0.2, 0.4, 0.6, 0.8, 1) were prepared using NiFe 2 O 4 (soft) and CoFe 2 O 4 (semi-hard) nanomaterials following solid state synthesis technique. Magnetic properties of synthesized samples were studied employing XRD, FESEM, VSM and DSC techniques. Curie temperature, T c of all the samples were determined from the temperature dependence of permeability and compared with the peak temperature of DSC thermograph. T c is found to decrease with increasing CoFe 2 O 4 substitution which has been ascribed due to weakening of J AB super-exchange interaction between tetrahedral and octahedral sites. The detail hysteresis parameters such as M s , M r , H c have been determined from M-H loop measured at 80, 200 and 300K. Saturation magnetization, M s measured...
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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