Substantially enhancing ferromagnetic resonance frequency via superposition of composition gradient sputtering and magnetoelectric coupling in FeCoAlO/PZN-PT heterostructures

作者：Xie, Shiming; Wan, Yong; Wang, Cuiling; Li, Qiang; Xu, Jie; Wu, Chenchen; Wen, Zheng; Fei, Xiaoping; Xu, Feng; Li, Shandong^*

来源：Journal of Alloys and Compounds, 2015, 642: 136-139.

DOI：10.1016/j.jallcom.2015.03.268

• Microwave soft magnetic film
• Magnetic anisotropy
• Composition gradient sputtering
• Magnetoelectric coupling
• Multiferroic heterostructure

Various methods were proposed to enhance the magnetic anisotropy field H-K and ferromagnetic resonance frequency f(FMR) of soft magnetic films (SMFs), however, the values of H-K and f(FMR) were still relatively low for the samples prepared by a single method alone. To further enhance the microwave ferromagnetic performances, in this paper, we proposed a superposition method in which the directions of uniaxial stresses induced by composition gradient and magnetoelectric coupling were designed to be parallel to each other, so that two individual H-K added up. As a result, the H-K was dramatically increased from 100 Oe to 735 Oe, and the f(FMR) from 3.4 GHz to 9.6 GHz in FeCoAlO/lead zinc niobate-lead titanate (PZN-PT with composition of 0.93Pb(Zn1/3Nb2/3)O-3-0.07PbTiO(3)) multiferroic heterostructures. This superposition method showed big advantage over any of the single method, therefore was a promising method for preparing high-performance microwave SMFs with f(FMR) in excess of X-band.

• 出版日期2015-9-5
• 单位山东大学; 青岛大学; 南京理工大学