| Na、K、Ag掺杂对La_(0.60)Sr_(0.40)MnO_3材料晶体结构、磁性和电输运性质的影响 |
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| 引用本文： | 赵福伟,岳彩霞,丁东,李爱君.Na、K、Ag掺杂对La_(0.60)Sr_(0.40)MnO_3材料晶体结构、磁性和电输运性质的影响[J].磁性材料及器件,2015(3):9-12. |
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| 作者姓名： | 赵福伟 岳彩霞 丁东 李爱君 |
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| 作者单位： | 1. 河北工程技术高等专科学校 教务处,河北沧州,061001;2. 河北化工医药职业技术学院 机电工程系,河北石家庄,050026;3. 华北科技学院 基础部,河北廊坊,101601;4. 第二炮兵工程大学理学院 物理室,陕西西安,710025 |
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| 基金项目： | 国家自然科学基金资助项目(11174069)；河北省自然科学基金资助项目(E2011205083)；河北省基础研究重点资助项目 |
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| 摘 要： | 利用溶胶-凝胶法制备了稀土锰氧化物La0.60Sr0.40-xNaxMn O3(x=0、0.10、0.15、0.20、0.30、0.33、0.35)、La0.60Sr0.40-xKxMn O3(x=0、0.15、0.20、0.30)、Agδ-La0.60Sr0.40-xAgx-δMn O3(x=0、0.15、0.20、0.25、0.30)系列多晶样品。研究发现Na+、K+、Ag+取代部分Sr2+后,当掺杂量x≥0.15时,Na、K、Ag系列样品的晶胞体积均随掺杂量x增加而单调变大,样品居里温度随Na、K、Ag掺杂量x的增加而降低;当Na、K、Ag含量较小时,三个系列样品的电阻率峰值随掺杂量x的增加而减小,当x0.20时,样品的电阻率峰值随x的增加而增大。对其微观机理进行了讨论,认为相对于替代离子半径,Mn4+与Mn3+离子对数目之比Rn是影响材料以上性质的主要原因。
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| 关 键 词： | 锰氧化物 溶胶-凝胶法 掺杂 晶体结构 磁性 电输运性质 |
Influence of Na,K and Ag doping on the crystal structure,magnetic and electrical transport properties of La0.60Sr0.40MnO3 compound |
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| ZHAO Fu-wei,YUE Cai-xia,DING Dong,LI Ai-jun.Influence of Na,K and Ag doping on the crystal structure,magnetic and electrical transport properties of La0.60Sr0.40MnO3 compound[J].Journal of Magnetic Materials and Devices,2015(3):9-12. |
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| Authors: | ZHAO Fu-wei YUE Cai-xia DING Dong LI Ai-jun |
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| Affiliation: | ZHAO Fu-wei;YUE Cai-xia;DING Dong;LI Ai-jun;Teaching Affair Office, Hebei Engineering and Technical College;Department of Electrical and Mechanical Engineering, Hebei Chemical Pharmaceutical Vocational and Technical College;Department of Basic Curriculum, North China Institute of Science and Technology;Department of Physics, College of Science,High Technology Research Institute; |
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| Abstract: | Perovskite rare-earth manganites polycrystalline samples La0.60Sr0.40-xNaxMnO3 (x=0, 0.10,0.15, 0.20, 0.30, 0.33 and0.35), La0.60Sr0.40-xKxMnO3 (x=0, 0.15, 0.20 and 0.30) and Agδ-La0.60Sr0.40-xAgx-δMnO3 (x=0, 0.15, 0.20, 0.25 and 0.30) were synthesized by sol-gel method. It is found that when Sr2+ions are partly substituted by Na+, K+or Ag+ions, the crystal cell volume of substituted samples increases monotonically with x for x≥0.15, the Curie temperature of substituted samples decreases with the increasing of x for x≥0.15;the resistivity peak values of substituted samples decreases with the increasing of x for x≤0.20 and increases with x for x>0.20. And its microscopic mechanism is also discussed, and compared with the ionic radius,the Rn( ratio of Mn4+and Mn3+) is the main factor affecting the material properties. |
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| Keywords: | manganite sol-gel method doping crystal structure magnetic properites electrical transport properties |
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