توزیع یونی و مغناطیسی کردن آلومینیوم جانشین فریت های لیتیمی

Ion distribution and saturation magnetization of

aluminum substituted lithium ferrites

توزیع یونی و مغناطیسی کردن آلومینیوم جانشین فریت های لیتیمی 

ABSTRACT

Ion distribution is determined in a series of aluminum substituted lithium ferrites by carefully analyzing the powder X-ray diffraction patterns. A new finding is that Al+3's substitute the Fe+3's in tetrahedral sites as well as in octahedral sites of the spinel structure. The proper formula, then, is (Fe1-a+3Ala+3)[Li0.5 +Fe1.5-(x-a)Alx-a+3]O 4, where a is approximately 0.23x2+0.22x. The saturation magnetizations are calculated and compared with the measured values.