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題名 | 巨磁阻效應教學實驗=The Experimental Teaching of Giant Magnetoresistance Effect |
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作者 | 呂虹萱; 陸健榮; | 書刊名 | 物理教育學刊 |
卷期 | 11:2 2010.12[民99.12] |
頁次 | 頁76-85 |
關鍵詞 | 巨磁阻效應; 教學實驗; Giant magnetoresistance effect; Experimental teaching; |
語文 | 中文(Chinese) |
中文摘要 | 2007 年物理諾貝爾獎得獎題目為「巨磁阻 效應」。此效應的發現,不但開啟了自旋電子學 的大門,而且使磁性記錄的技術有了重大的躍 進。為了讓學生在享受科技進步的同時,也能了 解背後科學家的努力研究。我們設計了巨磁阻教 學實驗,讓學生從操作中去學習巨磁阻效應的原 理。實驗開端先設置一螺線管,提供螺線管電 流,達到電生磁的效應,再將巨磁阻感測器放置 在螺線管內,紀錄感測器的電阻值變化。由外加 磁場改變,感測器電阻值隨之改變的情形,向學 生引入巨磁阻效應的概念。對於中學生及大一新 鮮人,我們使用他們能理解的電阻串並聯模型來 解釋巨磁阻效應的機制;而更進階的學生,則可 以做磁滯效應的數值分析部分。 |
英文摘要 | The Nobel Prize in Physics 2007 was awarded to Giant Magnetoresistance. The discovery of this effect not only opened the door of the spintronics but also improved the magnetic recording technology. In order to introduce the fundamentals of the new technology and let students know the hard work of the scientists, a Giant Magnetoresistance teaching experiment was designed. From operating the experiment , students can learn the principle of Giant Magnetoresistance. In the experiment, a solenoid was used to provide the magnetic field. Then, a GMR sensor was set in the center of the solenoid. As the magnetic field was changed, the resistance of GMR sensor will also be changed. By way of Recording the data and processing the whole information, teachers can bring in the concept of Giant Magnetoresistance. And a phenomenal model was discussed with resistance combined with series and parallel which can be understandable for the middle school students and the fresh men. Moreover, the hysteresis effect was analyzed numerically for the advanced students. |
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