English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28603/40634
Visitors : 4357852      Online Users : 300
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/47189

Title: Magnetostriction and Tunneling Magnetoresistance of Co/AlO/Co/IrMn Junction
Authors: S. R. Jia
Yuan-Tsung Chen
S. U. Jen
Y. D. Yao
Contributors: 國立臺灣海洋大學:光電科學研究所
Date: 2008-11
Issue Date: 2018-07-04T07:24:46Z
Publisher: IEEE Trans
Abstract: Abstract: Cross-strip magnetic tunnel junctions (MTJs) were fabricated following this sequence: Si(100)/Ta(30Å)/CoFeB(80Å)/AlOx(to)/Co(70Å)/IrMn(90Å)/Ta(100Å), under an in-plane deposition field (h)=500Oe, where to=12, 17, 22, and 26Å is the thickness of the AlOx layer. From the resistance (Ro) versus to plot, Ro increases from 255to1138Ω exponentially, as to increases from 12to26Å. This indicates that the quantum tunneling mechanism is valid in our case. Furthermore, the tunneling magnetoresistance (TMR) increases initially from 49% to 63% and then decreases to 33%, as to increases monotonically. This shows that with the increase of the barrier thickness, to⩾17Å, the spin polarization in the current after tunneling is weakened eventually. The microstructure of the to=17Å MTJ observed under high-resolution cross-sectional transmission electron microscope shows that the interfaces between CoFeB∕AlOx and AlOx∕Co are smooth, resulting in the high TMR ratio observed. Saturation magnetostriction (λs) of this series of CoFeB∕AlOx∕Co MTJs ranges from −5to−2ppm. The λs versus to plot also shows the concave-up feature. Finally, we find that the optimal MTJ has the following properties: TMR=63% and λs=−5ppm.
Relation: 44(11)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/47189
Appears in Collections:[光電科學研究所] 期刊論文

Files in This Item:

File Description SizeFormat

All items in NTOUR are protected by copyright, with all rights reserved.


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback