| La0.67Sr0.33MnO3薄膜光响应特性研究 |
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| 引用本文： | 陈长乐,王跃龙,汪世林,金克新,王永仓,宋宙模,袁孝.La0.67Sr0.33MnO3薄膜光响应特性研究[J].光子学报,2002,31(9):1151-1154. |
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| 作者姓名： | 陈长乐 王跃龙 汪世林 金克新 王永仓 宋宙模 袁孝 |
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| 作者单位： | 西北工业大学应用物理系,西安,710072 |
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| 基金项目： | 国家自然基金(60171034)和陕西省自然基金(2001C21)资助项目 |
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| 摘 要： | 实验测量了在不同温度和电场下,超巨磁电阻CMR(colossal magnetoresistance)薄膜材料La0.67Sr0.33MnO3(LSMO)的光响应特性.发现样品被激光照射后,具有光诱导电阻变化的特性.在温度小于居里点Tc时,电阻随温度升高而增大,在Tc以上时,电阻则随温度升高而减小.通过对样品的光脉冲响应和偏置电场的关系分析,可认为其光响应特性的机理与激光激励下引起的自旋系统变化有关.
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| 关 键 词： | 超巨磁电阻 LSMO氧化物薄膜 光响应 自旋系统 双交换作用 |
| 收稿时间： | 2002/1/11 |
| 修稿时间： | 2002年1月11日 |
OPTICAL RESPONSE PROPERTY OF La0.67Sr0.33MnO3 CMR THIN FILM |
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| Chen Changle,Wang Yuelong,Wang Shiling,Jin Kexin,Wang Yongcang,Song Zhoumo,Yuan Xiao Dept. of Applied Physics,Northwestern Polytechnical University,Xi'an.OPTICAL RESPONSE PROPERTY OF La0.67Sr0.33MnO3 CMR THIN FILM[J].Acta Photonica Sinica,2002,31(9):1151-1154. |
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| Authors: | Chen Changle Wang Yuelong Wang Shiling Jin Kexin Wang Yongcang Song Zhoumo Yuan Xiao Dept of Applied Physics Northwestern Polytechnical University Xi'an |
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| Affiliation: | Chen Changle,Wang Yuelong,Wang Shiling,Jin Kexin,Wang Yongcang,Song Zhoumo,Yuan Xiao Dept. of Applied Physics,Northwestern Polytechnical University,Xi'an 710072 |
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| Abstract: | Pulsed laser induced transient resistivity change for perovskite manganite La 0.67 Sr 0.33 MnO 3 thin film has been studied under different electric field and temperature field. The results show that the resistivity of the film decreases above Tc (Curie temperature) and increases below Tc while irradiated by pulsed laser. The possible mechanism for the observed phenomena has been discussed. |
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| Keywords: | Colossal magnetoresistance LSMO oxide thin film Optical response Spin system Double exchange effect |
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