Details

Autor(en) / Beteiligte

• Yin, Xiaona
• Wang, Chunmei
• Li, Shandong
• Nian, Fushun
• Zhao, Guoxia
• Chu, Xian-Ming

Titel

Large tunability of frequency in Fe0.5Co0.5-ZnO/PZN-PT nanogranular films with high resistivity

Ist Teil von

• Journal of magnetism and magnetic materials, 2019-08, Vol.483, p.48-53

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Excessive ZnO-doped Fe0.5Co0.5 nanogranular films exhibit a very high resistivity.•An uniaxial anisotropy is formed in composition gradient sputtered Fe0.5Co0.5-ZnO.•An ultrahigh fFMR of 10.48 GHz was achieved in Fe0.5Co0.5-ZnO/PZN-PT at 8 kV/cm.•The broad E-field tunability of 5.58 GHz provides great opportunities for self-biased MMICs. The soft magnetic films (SMFs) using in monolithic microwave integrated circuits (MMICs) are suffered from the lower ferromagnetic resonance frequency fFMR and resistivity. In this study, Fe0.5Co0.5-ZnO films with high resistivity were fabricated by a compositional gradient sputtering on (0 1 1) lead zinc niobate–lead titanate (PZN-PT) substrates. It is interesting to note that the resistivity of the ZnO-doped Fe0.5Co0.5 films is 10–30 times larger than that of pure Fe0.5Co0.5 films. An ultrahigh fFMR of 10.48 GHz were achieved at electric field of 8 kV/cm without bias magnetic field. The excellent microwave ferromagnetic performances in as-deposited films can be attributed to two reasons: (1) the large uniaxial anisotropy field induced by gradient composition of doping ZnO, (2) the strong magnetoelectric coupling between the ferromagnetic/ferrielectric interfaces under the condition of high resistivity in Fe0.5Co0.5-ZnO films.