%0 Journal Article
%T Comparison between Top and Bottom NiO-pinning Spin Valves: Effect of Interfacial Roughness on Specular Reflection<br>Comparison between Top and Bottom NiO-pinning Spin Valves： Effect of Interfacial Roughness on Specular Reflection
%A Liang SUN
%A Jun DU
%A Xiaoshan WU
%A Shiming ZHOU
%A Xixiang ZHANG
%A An HU
%A <br>Liang
%A SUN
%A Jun
%A DU
%A Xiaoshan
%A WU
%A Shiming
%A ZHOU
%A Xixiang
%A ZHANG
%A An
%A HU
%J 材料科学技术学报
%D 2006
%I 
%X Top and bottom NiO-pinning spin valves of Si/Ta/NiO/Co/Cu/Co/Ta and Si/Ta/Co/Cu/Co/NiO/Ta wereprepared by magnetron sputtering, and X-ray diffraction and giant magnetoresistance (GMR) ratio were measured in the temperature range from 5 to 300 K. For the bottom spin valve, the interfacial roughness at NiO/Co is much smaller than that of Co/NiO in the top one. The Co/Cu and Cu/Co interfaces have the same roughness in the bottom and the top spin valves. NiO, Co, and Cu layers have (111) preferred orientations in the top one and random orientations in the bottom one. The GMR ratio of the bottom spin valve is larger than that of the top one at all temperatures and their difference increases with decreasing temperature.
%K Spin valve
%K Specular reflection
%K Interfacial roughness<br>螺旋电子管
%K 镜面反射
%K 界面粗糙度
%K 氧化镍
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=4FE2C779F87A807AAF34411D4020F825&yid=37904DC365DD7266&vid=BC12EA701C895178&iid=38B194292C032A66&sid=21D8CE17EE5EE354&eid=8ACD9060100C26F1&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=20