XRD pattern of the aggregates.
SEM images at different magnification of aggregates of FeCo nanocapsules show (a) a large branch of the aggregates, (b) a local image of the aggregates indicated by the arrow in (a), and (c) particles adhering together to form the flocculent structure indicated by the arrow in (b).
(a) Morphology and size distribution of the FeCo nanocapsules (the inset shows the corresponding SAED pattern). (b) Wirelike structure self-assembled by several nanocapsules (the inset shows the electron diffraction dots of the nanocapsules indicated by the arrow). (c) HRTEM image of a FeCo nanocapsule.
(a) Zero-field-cooled (ZFC) and field-cooled (FC) magnetization curves of FeCo nanocapsules at an applied field between 5 and 300 K. (b) Magnetic hysteresis loop at 295 K of FeCo nanocapsules.
The relative complex permittivity (a) and permeability (b) of a FeCo nanocapsule-paraffin wax sample versus frequency.
Microwave RL of a FeCo nanocapsule-paraffin wax sample versus frequency.
Dielectric loss factor and magnetic loss factor of FeCo nanocapsule-paraffin wax sample versus frequency.
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