| 亚锰酸盐La0.7CaxSr0.3-xMnO3的磁电阻效应 |
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| 引用本文： | 王晶. 亚锰酸盐La0.7CaxSr0.3-xMnO3的磁电阻效应[J]. 哈尔滨师范大学自然科学学报, 2003, 19(2): 39-41 |
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| 作者姓名： | 王晶 |
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| 作者单位： | 哈尔滨理工大学 |
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| 基金项目： | 黑龙江省自然科学基金资助项目(F01-21) |
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| 摘 要： | 研究了用固相反应法制备亚锰酸盐La0.7CaxSr0.3xMnO3系列多晶样品(量分数x＝0．05，0．10，0．15，0．20，0．25，0．30)，并在零磁场和0．3T磁场下研究了电阻和磁电阻与温度(77—380K)的关系，结果发现随x的增加，样品的巨磁电阻效应的峰值温度向高温移动，磁电阻峰值基本保持不变.
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| 关 键 词： | 亚锰酸盐 La0.7CaxSr0.3－xMnO3 磁电阻效应 铁磁性 磁超晶格 钙钛矿型锰氧化物 |
| 修稿时间： | 2003-03-31 |
MAGNETORESISTANCE EFFECTS OF MANGANITE La0.7CaxSr0.3-xMnO3 |
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| Wang Jing. MAGNETORESISTANCE EFFECTS OF MANGANITE La0.7CaxSr0.3-xMnO3[J]. Natural Science Journal of Harbin Normal University, 2003, 19(2): 39-41 |
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| Authors: | Wang Jing |
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| Affiliation: | Harbin University of Science and Technology |
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| Abstract: | The manganite polycrystalline samples La 0.7 Ca x Sr 0.3-x MnO 3( x =0,0.05,0.10,0.15,0.20,0.25,0.30) were prepared by the solid-state reaction technique. The electrical resistance( R ) and magneto resistance (M R ) have been measured in the temperature region form 77 K to 380 K in applied fields from zero to 0.3 T. The element substitution of Ce for La and the doping concentration dependence of R and M R were studied. It is found that the temperature of the peak of giant magneto resistance (GMR) increase. While the temperatures, at which the peak of M R appears, is equal basically. |
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| Keywords: | Manganite Magneto resistance effect Ferromagnetism |
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