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| 巨磁阻薄膜激光感生电压的温度稳定性研究 | |
| 引用本文： | 崔文东,张鹏翔,刘翔,张国勇,谈松林,戴永年. 巨磁阻薄膜激光感生电压的温度稳定性研究[J]. 激光技术, 2007, 31(6): 636-638 |
| 作者姓名： | 崔文东 张鹏翔 刘翔 张国勇 谈松林 戴永年 |
| 作者单位： | 昆明理工大学;昆明理工大学;昆明理工大学;昆明理工大学;昆明理工大学 |
| 摘 要： | 为了研究温度对激光感生热电电压的影响,采用脉冲激光沉积方法制备了La1-XCaXMnO(LCMO),La1-XPbXMnO(LPMO)和La1-XSrXCoO(LSCO)3种薄膜.用锁相斩波系统测量了激光感生热电电压依环境温度的变化并定义了温度系数,进行了理论分析和实验论证,取得了温度系数数据.结果表明,LSCO的温度系数最小并为正温度系数,LC-MO温度系数最大是负温度系数,LPMO温度系数为正.这一结果对激光感生电压器件的稳定性是有帮助的. |
| 关 键 词： | 薄膜 温度系数 锁相斩波系统 激光感生热电电压信号 |
| 文章编号： | 1001-3806（2007）06-0636-03 |
| 收稿时间： | 2006-09-14 |
| 修稿时间： | 2006-11-10 |
Temperature stability of laser induced thermoelectric voltage signal in colossal magneto resistance thin films |
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| CUI Wen-dong,ZHANG Peng-xiang,LIU Xiang,ZHANG Guo-yong,TAN Song-lin,DAI Yong-nian. Temperature stability of laser induced thermoelectric voltage signal in colossal magneto resistance thin films[J]. Laser Technology, 2007, 31(6): 636-638 | |
| Authors: | CUI Wen-dong ZHANG Peng-xiang LIU Xiang ZHANG Guo-yong TAN Song-lin DAI Yong-nian |
| Abstract: | La1－XCaXMnO(LCMO),La1－XPbXMnO(LPMO)and La1－XSrXCoO(LSCO)thin films were prepared with laser pulse deposition technique in order to investigate the laser induced thermoelectric voltage signal which affected by temperature. The laser induced thermoelectric voltage signals of La1－X CaXMnO3(LCMO),La1－X PbXMnO3(LPMO)and La1－X SrXCoO3(LSCO)thin films were measured at 290K ～ 340K temperature range by using lock-in amplifier. The signal-temperature coefficients(STC)of three CMR thin films were defined and compared. It was found that the LSCO demonstrated positive and smallest STC,while LCMO showed largest and negative STC. |
| Keywords: | thin films signal-temperature coefficient lock-in amplifier laser induced thermoelectric voltage signal |
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