Magnetic switching properties of magnetic tunnel junctions using a synthetic ferrimagnet free layer
Magnetic switching properties of magnetic tunnel junctions using a synthetic ferrimagnet free layer
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DOI：
10.1063/1.1669053
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发表时间：
2004-03
影响因子：
3.2
通讯作者：
T. Nozaki;Y. Jiang;H. Sukegawa;N. Tezuka;A. Hirohata;K. Inomata;S. Sugimoto
中科院分区：
文献类型：
--
作者：
T. Nozaki;Y. Jiang;H. Sukegawa;N. Tezuka;A. Hirohata;K. Inomata;S. Sugimoto
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Magnetic tunnel junctions (MTJs) using a synthetic ferrimagnet (SyF) free layer consisting of Co90Fe10/Ru/Co90Fe10 were deposited on a thermally oxidized Si substrate using an ultrahigh-vacuum sputtering system, and were patterned into micron to submicron sizes using electron-beam lithography and Ar ion milling. Magnetic switching properties and tunneling magnetoresistance (TMR) were investigated. A SyF free layer can maintain high remanence even for the aspect ratio of 1, and exhibits a size-independent switching field in all element widths from 0.25 to 16 μm investigated. Additionally, these MTJs show large TMR ratio up to 40% after annealing at 250 °C for 60 min. These results demonstrate that a SyF free layer can be applied to future spintronics nanodevices.