Electric field control of the exchange spring effect in perpendicularly magnetized FePt/NiFe bilayers
Guo Zhe
Yang Xiaofei
Deng Jiefang
Yan Baiqian
Zheng Juanjuan
Ding Jinjun
Li Jiapu
Zhu Benpeng
Chen Shi
Ou-Yang Jun
Zhang Yue
· 2016
期刊名称：
Journal of Alloys and Compounds
2016 年
687 卷
摘要：
The electric field control of the exchange spring (ES) effect in perpendicularly magnetized bilayers is studied using micromagnetic simulation. The ES bilayer with a total thickness of 20 nm is composed of a FePt layer with perpendicular magnetic anisotropy (PMA) and a NiFe layer with in-plane anisotropy. The thickness ratio between the FePt and NiFe layers (TRFN) is varied. Single-crystal lead zinc niobate-lead titanate (PZN-PT) forms the piezoelectric substrate, and electric fields are applied across the thickness of the substrate to induce in-plane stress. The results reveal that application of a negative electric field E reduces the switching field (H
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