| Co/Al2O3/FeNi隧道结的中间层厚度对其输运特性的影响 |
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| 引用本文： | 任妙娟,陈延学,张海鹍.Co/Al2O3/FeNi隧道结的中间层厚度对其输运特性的影响[J].济南大学学报(自然科学版),2005,19(4):362-363. |
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| 作者姓名： | 任妙娟 陈延学 张海鹍 |
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| 作者单位： | 1. 济南大学,理学院,山东,济南,250022
2. 山东大学,物理与微电子学院,山东,济南,250100 |
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| 基金项目： | 济南大学博士基金资助项目(B0404) |
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| 摘 要： | 制备了不同Al2O3厚度的Co／Al2O3／FeNi隧道结，并在77K温度下测量了其输运特性。发现随着厚度的增加，TMR下降。但是当Al2O3厚度降为2nm时，磁电阻不再出现典型的双峰曲线，而是呈现高阻和低阻两个状态。测量了隧道结的TMR随外加电压的变化、伏安特性曲线、电阻随温度的变化曲线，综合所有因素，在文中制备条件下，Al2O3厚度为4nm时，隧道结性能最好。
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| 关 键 词： | 凝聚态物理 隧道结 输运特性 |
| 文章编号： | 1671-3559(2005)04-0362-02 |
| 修稿时间： | 2004年12月26 |
Effect of the Thickness of Al2O3 on the Transport Properties of Tunneling Junction Co/Al2O3/FeNi |
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| REN Miao-juan,CHEN Yan-Xue,ZHANG Han-kun.Effect of the Thickness of Al2O3 on the Transport Properties of Tunneling Junction Co/Al2O3/FeNi[J].Journal of Jinan University(Science & Technology),2005,19(4):362-363. |
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| Authors: | REN Miao-juan CHEN Yan-Xue ZHANG Han-kun |
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| Institution: | REN Miao-juan~1,CHEN Yan-xue~2,ZHANG Han-kun~1 |
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| Abstract: | For studying the effects of in-between layers on the transport properties of tunneling junctions, we prepared a series of Co/Al_2O_3/FeNi tunneling junction with different thickness of Al_2O_3,and studied their transport properties at 77?K.It is found that TMR decreases as the thickness of Al_2O_3 increases. But when the thickness reduced to 2?nm,the typical double-peak curve of TMR disappears.Instead, two states of high and low resistances appear.We also measured the changes of TMR versus voltages,I-V curves,and the relationship between resistance and temperature.Considering all the results, we draw the conclusion that 4nm is the optimal thickness of Al_2O_3 to fabricate Co/Al_2O_3/FeNi tunneling junction under our conditions. |
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| Keywords: | physics of condensed matters tunneling junction transport properties |
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