Irradiation-controlled giant magnetoresistance of PtMn-based spin valve

被引：3
|
作者：
Huang, Sheng-Huang [1 ]
Lai, Chih-Huang [1 ]
Chiang, C. C. [1 ]
Yang, Cheng-Han [1 ]
机构：
[1] Natl Tsing Huang Univ, Dept Mat Sci & Engn, Hsinchu 30013, Taiwan
来源：
JOURNAL OF APPLIED PHYSICS | 2006年 / 99卷 / 08期
关键词：
D O I：
10.1063/1.2173603
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
He+-ion irradiation resulted in the direct ordering of PtMn without postannealing. Samples were irradiated with 2 MeV He+ ions and a beam current of 1.08 mu A/cm(2) such that the corresponding surface temperature was 190 degrees C. The exchange bias direction was set in situ during irradiation in a field of 900 Oe. A high giant magnetoresistance (GMR) ratio of 11% was obtained in PtMn-based spin valves after He+ irradiation. The GMR is completely eliminated after it is irradiated with oxygen ions at 42 keV. Combining He+ with oxygen-ion irradiation can provide magnetic patterning for GMR sensors. (C) 2006 American Institute of Physics.
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页数：3
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