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Special Issue on Nanoscience and Technology (ICONSAT 2010); Edited by D. Bahadur, Satish Vitta and A. K. SoodNo Access

TEMPERATURE DEPENDENT COERCIVITY AND RELAXATION PHENOMENA IN AMORPHOUS Fe–(Mn)–Zr–B NANOPARTICLES

    https://doi.org/10.1142/S0219581X11008435Cited by:2 (Source: Crossref)

    We report the temperature dependent coercivity behavior and the improvement of room temperature soft magnetic properties in interacting amorphous Fe–Mn–Zr–B powder nanoparticles prepared by mechanical alloying of elemental powders. With increasing Mn concentration from 5 to 20 at.% in Fe–Zr–B alloys, the coercivity (HC) reduces drastically from 170 to 25 Oe. Temperature dependent HC behavior shows exponential variation of HC with temperature. Interparticle interactions dominate the low temperature behavior and surface effect on the nanoparticles is more pronounced at low temperatures. Magnetic relaxation behavior shows slow relaxation in the interacting amorphous nanoparticles and the relaxation process is observed to be thermally activated in the present studies.