Enhanced electro-magnetic properties in La0.7Sr0.3MnO3/ZrO2 composites

被引:0
作者
A M Ahmed
H F Mohamed
A K Diab
A E A Abd El-Mo’ez A Mohamed
Aml M Mazen
机构
[1] Sohag University,Department of Physics, Faculty of Science
来源
Indian Journal of Physics | 2015年 / 89卷
关键词
Colossal magnetoresistance; Electrical resistivity; DC magnetization; 75.47.Lx; 75.47.Gk; 72.80.Tm;
D O I
暂无
中图分类号
学科分类号
摘要
(La0.7Sr0.3MnO3)1−x/(ZrO2)x (x = 0.0–0.150, step 0.025) composites have been prepared via solid state reaction process. The X-ray diffraction and scanning electron microscopic observations indicate that there are ZrO2 grains separated from La0.7Sr0.3MnO3 matrix. It has been found that the inclusion of ZrO2 content decreases the conductivity, magnetization and metal–semiconductor transition, whereas it increases the low field magnetoresistance. Possible effects of grain boundaries on the low field magnetoresistance have been discussed. The small ZrO2 grains are trapped between La0.7Sr0.3MnO3 grains may be acting as a barrier for spin-polarized tunneling and enhance the low-field magnetoresistance.
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页码:561 / 570
页数:9
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共 61 条
[1]  
El-Kassab I(2001)undefined Physica B 305 233-undefined
[2]  
Ahmed AM(1999)undefined Appl. Phys. Lett. 74 2218-undefined
[3]  
Mandal P(1998)undefined Appl. Phys. Lett. 73 396-undefined
[4]  
Bearner K(1999)undefined Appl. Phys. Lett. 74 4014-undefined
[5]  
Kattwinkel A(2001)undefined Solid State Commun. 117 261-undefined
[6]  
Sondermann U(2001)undefined Appl. Phys. Lett. 78 362-undefined
[7]  
Walter T(2004)undefined Phys. B 352 330-undefined
[8]  
Wang XL(2006)undefined J. Magn. Magn. Mater. 301 452-undefined
[9]  
Dou SX(2011)undefined J. Supercond. Nov. Magn. 24 597-undefined
[10]  
Liu HK(2003)undefined J. Phys. D: Appl. Phys. 36 1923-undefined