Effects of CTAB on magnetic properties of ZnLa_0.02Fe_1.98O₄ crystals

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• 作者：Baobao Zhao ; Zhaodong Nan
• 关键词：ZnLa0.02Fe1.98O4 ; Surfactant ; Magnetic property
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：15 December, 2013
• 年：2013
• 卷：580
• 期：Complete
• 页码：321-326
• 全文大小：1850 K

文摘

A facile and one-pot approach was employed to prepare nanosized La³⁺ doped zinc ferrites (ZnLa_0.02Fe_1.98O₄), where hexadecyl (trimethyl) azanium bromide (CTAB) was used to modify the magnetic properties of the as-prepared samples through effects of dispersion of La³⁺ in the ZnLa_0.02Fe_1.98O₄ crystals. The lattice constant, crystallite size, M_s, M_r, and H_c values of ZnLa_0.02Fe_1.98O₄ crystals decrease with the increasing concentration of CTAB from 0.5 to 1.2 mM. However, the ZnLa_0.02Fe_1.98O₄ crystals prepared without CTAB show special magnetic properties compared with those samples fabricated with CTAB, such as the crystallite size is smaller and M_s, M_r, and H_c values are higher than the sample fabricated under 1.0 mM CTAB. The formation of LaFeO₃ for the sample fabricated under 1.0 mM CTAB may duce this change.