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FeCoP nanocrystalline films were successfully electrodeposited on the Cu film coated silicon substrate in the bath containing Fe2+, Co2+, as well as different concentration H2PO− ions ranging from 0.001 mol/L to 0.01 mol/L. And then the samples experienced magnetic heat treatment with different heating rates. Effects of H2PO− concentration and magnetic heat treatment on morphological, structural, and magnetic properties of the films were investigated by scanning electron microscopy, X-ray diffraction, vibrating sample magnetometer, and vector network analyzer. The results suggest that the as-deposited films do not exhibit obvious in-plane uniaxial magnetic anisotropy, and interestingly after magnetic heat treatment at heating rate of 6 °C/min, the FeCoP films will possess better in-plane uniaxial magnetic anisotropy. It has been obtained that morphology and grain size play important roles in determining magnetic properties. The magnetic performance of FeCoP films with different phosphorus content can be improved by appropriate magnetic heat treatment.

Magnetic properties of magnetostrictive FeGa films deposited by electrodeposition method on flexible curvature substrates were investigated under various mechanical stresses. The stresses of the bowed substrates were realized by series of different concentric circles. FeGa films exhibit a significant uniaxial magnetic anisotropy after the application of tensile or compressive stress, and the anisotropy of the film can be regulated by the residual stress. In addition, the magnetostriction of FeGa films is estimated through approximate calculation, indicating that the saturation magnetostrictive constant of films is enhanced with the increased tensile and compressive strains. These results provide another way to tune the magnetic properties and magnetostriction of flexible thin films, which is particularly important for the development of the flexible magneto-electronic devices.

SrDy x Fe12−x O19 (x ≤ 0.08) nanofibers have been synthesized by the electrospinning method followed by calcinations process. The partial substitution of rare earth ions Dy3+ (10.5 μ B of magnetic moments) mainly occupying 12k sublattice sites in the SrFe12O19 crystal structure is investigated and discussed in this work. An enhanced coercivity of 7155 Oe has been obtained when the doped content reached to 0.08 at a relative low calcination temperature of 800 °C. As a result, we believe the synthesized SrDy x Fe12−x O19 nanofibers can potentially be useful in high-density recording media as well as permanent magnets.