کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1473221 | 991033 | 2013 | 5 صفحه PDF | دانلود رایگان |
The structure and magnetic properties of FeAl2O4 synthesized by microwave magnetic field (H-field) irradiation were investigated to reveal the effect of the H-field on the crystal structure and the magnetic characteristics of an antiferromagnetic material. The role of the H-field was investigated using a single-mode cavity, which can spatially separate the maximum points of the alternating electric field (E-field) and H-field in the cavity. In H-field irradiation, the crystallite diameter decreased compared to that in conventional heating. In conventional heating, the crystallite diameter did not change with increasing quenching speed. Thus, it is suggested that a decrease in crystallite diameter occurs during H-field irradiation. Furthermore, magnetization after H-field irradiation was greater than that after conventional heating. It is considered that magnetic clusters appear when Fe3+ partially replaces Al3+ in the octahedral sites in the grain boundaries, which were formed as a result of decreasing crystallite diameter.
Journal: Journal of Asian Ceramic Societies - Volume 1, Issue 1, March 2013, Pages 41–45