We investigate the making of magnetic hollow spheres of Co3O4 (2) and fcc Co (3) with diameter 500 nm and thickness 40 nm, using polystyrene-bead templates. The spheres are characterized by scanning electron microscope, transmission electron microscope, electron diffraction, and x-ray diffraction. Magnetic measurements on 2 reveal a drastic enhancement of remnant magnetization below TN induced by cooling-field, while measurements on 3 indicate a soft ferromagnetism similar to that of bulk fcc Co.
No takes yet. Share an insight, caveat, or question.
Yoshikawa et al. (2004) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: