Influence of Milling Time on the Crystallization, Morphology and Magnetic Properties of Polycrystalline Yttrium Iron Garnet

Rodziah Nazlan; Mansor Hashim; Nor Hapishah Abdullah; Idza Riati Ibrahim; Ismayadi Ismail

doi:10.4028/www.scientific.net/AMR.501.324

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 501Influence of Milling Time on the Crystallization,...

Influence of Milling Time on the Crystallization, Morphology and Magnetic Properties of Polycrystalline Yttrium Iron Garnet

Abstract:

The polycrystalline Yttrium Iron Garnet (YIG) powder with the chemical formula Y3Fe5O12 has been synthesized by using High Energy Ball Milling technique. The effect of various preparation parameters on the crystallinity, morphology and complex permeability of YIG, which includes milling time and annealing temperature were studied respectively by using XRD, SEM and Impedance Material Analyzer. The frequency dependence of complex permeability namely real permeability, µ’ and magnetic loss, µ’’ were measured at room temperature for samples sintered from 600°C to 1400°C, in the frequency range 10 MHz to 1 GHz. The results showed that milling time plays a role in determining the crystallinity of the milled powder where higher milling time results in better crystallinity due to high reactivity of the particles. From complex permeability measurement, it was observed that the initial permeability and magnetic loss increased with increasing grain size. The permeability values increased with annealing temperature and the absolute values of permeability decreased after attaining the natural resonance frequency of the material.

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Periodical:

Advanced Materials Research (Volume 501)

Pages:

324-328

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.501.324

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Online since:

April 2012

Authors:

Rodziah Nazlan, Mansor Hashim, Nor Hapishah Abdullah, Idza Riati Ibrahim, Ismayadi Ismail

Keywords:

Complex Permeability, High Energy Ball Milling, Milling Time, Sintering Temperature

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