| Al^3＋代换Fe^3＋对钴铁氧体结构与磁性能的影响 |
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| 引用本文： | 焦永芳,吴延昭,方庆清. Al^3＋代换Fe^3＋对钴铁氧体结构与磁性能的影响[J]. 天津师范大学学报(自然科学版), 2008, 28(1): 40-42 |
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| 作者姓名： | 焦永芳 吴延昭 方庆清 |
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| 作者单位： | 1. 天津科技大学,理学院,天津,300222
2. 安徽大学,物理与材料科学学院,合肥,230039 |
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| 基金项目： | 天津科技大学校科研和校改项目 |
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| 摘 要： | 采用化学共沉法制备了CoFe2-xAlxO4（x=0．1～0．5）铁氧体纳米粉料，并在不同温度下进行退火处理，利用X射线衍射仪（XRD）、振动样品磁强计（VSM）对样品的结构和磁性进行了测量和分析．结果表明：所有样品均形成了单一的尖晶石相，晶粒尺寸为35～45nm；经1280℃退火后的样品能同时获得较高的比饱和磁化强度如和矫顽力Hc；随铝代换量x的增大，比饱和磁化强度起初变化平缓然后迅速降低，而矫顽力却呈现出了先增后减的趋势，在x=0．3附近出现峰值。
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| 关 键 词： | 铁氧体 化学共沉法 磁性能 |
| 文章编号： | 1671-1114（2008）01-0040-03 |
| 收稿时间： | 2007-11-05 |
| 修稿时间： | 2007-11-05 |
The influence of Al3+ substituted for Fe3+ on the structure and magnetic properties of cobalt ferrite |
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| JIAO Yongfang,WU Yanzhao,FANG Qingqing. The influence of Al3+ substituted for Fe3+ on the structure and magnetic properties of cobalt ferrite[J]. Journal of Tianjin Normal University(Natural Science Edition), 2008, 28(1): 40-42 |
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| Authors: | JIAO Yongfang WU Yanzhao FANG Qingqing |
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| Affiliation: | J IA0 Yongfang , WU Yanzhao , FANG Qingqing (1. School of Science, Tianjin University of Science ＆ Technology, Tianjin 300222, China ; 2. School of Physics and Material Science, Anhui University, Hefei 230039, China) |
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| Abstract: | Cobalt ferrite CoFe2-x AlxO4 （x=0. 1--0. 5） nanocrystalline powders were prepared by chemical coprecipitation method and annealed at different temperature in air. The structure and magnetic properties of the samples were measured and analyzed through the X-ray diffraction （XRD） and vibrating sample magnetometer （VSM）. The experimental results showed that monophase CoFe2-x AlxO4 ferrites with spinel structure were formed for all the samples and the grain size was in the range of 35-45 nrn. Higher specific saturation magnetization as and coercivity Hc were obtained simultaneously when the samples were annealed at 1 280 ℃. With the increasing of x, as remained a flat state at the beginning and then decreased rapidly, while Hc increased at the beginning and then decreased, and the maximum of Hc was attained at x=0. 3. |
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| Keywords: | ferrite chemical coprecipitation method magnetic properties |
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