Exchange coupling of CrPt/FePt bilayer

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作者：

Department of Physics, Capital Normal University, Beijing 100048, China ^{[1
]}

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来源：

Gongneng Cailiao | 2009年 / SUPPL. 1卷 / 149-151期

关键词：

Grain size and shape;

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摘要：

CrPt/FePt bilayer and FePt/CrPt bilayer were prepared by using DC magnetron sputtering(Ta as the buffer layer and cap layer). The samples were annealed at 350°C for 5h in a vacuum furnace with a pressure better than 5×10-4Pa. A static magnetic field of 63.68kA/m was applied parallel to the easy axis of the films during the heat treatment. It was found that pinning field of the CrPt/FePt system was much larger than the FePt/CrPt system after annealing. We analysed the reasons by studying the crystallographic texture and grain size. The results showed that the strong exchange bias field was caused by the CrPt/FePt system with a weak preferred orientation and small grain size.

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