High-Frequency Ferromagnetic Properties and Magnetic Domain Structures of FeNdBO Thin Films
FeNdBO films were deposited by DC magnetron sputtering. The high-frequency ferromagnetic properties of the films were dramatically enhanced by annealing at 350 °C for 1 hour. In comparison with the as-deposited film, the resonance frequency increased from 1.32 to over 3 GHz, while relative permeability still maintained at a high value of 100. Magnetic force microscope (MFM) revealed strip domains in the FeNdBO films. The domain width of ∼100 nm for the annealed film was smaller than that for the as-deposited film, implying the enhancement of anisotropy field due to annealing. Promising high-frequency ferromagnetic properties of FeNdBO films can be attributed to the high values of Ms (15.7 kG), Hk (over 1000 Oe), and ρ (more than 10 Ωm).
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Document Type: Research Article
Publication date: February 1, 2009
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