文章基本信息

标题：Thermally assisted electric field control of magnetism in flexible multiferroic heterostructures
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作者：Yiwei Liu ; Qingfeng Zhan ; Guohong Dai 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep06925
语种：English
出版社：Springer Nature
摘要：Thermal and electrical control of magnetic anisotropy were investigated in flexible Fe₈₁Ga₁₉ (FeGa)/Polyvinylidene fluoride (PVDF) multiferroic heterostructures. Due to the large anisotropic thermal deformation of PVDF ( α ₁ = −13 × 10⁻⁶ K⁻¹ and α ₂ = −145 × 10⁻⁶ K⁻¹), the in-plane uniaxial magnetic anisotropy (UMA) of FeGa can be reoriented 90° by changing the temperature across 295 K where the films are magnetically isotropic. Thus, the magnetization of FeGa can be reversed by the thermal cycling between 280 and 320 K under a constant magnetic field lower than coercivity. Moreover, under the assistance of thermal deformation with slightly heating the samples to the critical temperature, the electric field of ± 267 kV cm⁻¹ can well align the UMA along the two orthogonal directions. The new route of combining thermal and electrical control of magnetic properties realized in PVDF-based flexible multiferroic materials shows good prospects in application of flexible thermal spintronic devices and flexible microwave magnetic materials.