Surface-sensitive magnetism of mesoscopic hollow CeO2 spheres

Surface and interface mediated magnetism in mesoscopic ceria@carbon core–shell structures

“…For the other three samples, Hc is enhanced up to 200 Oe. Such values are close to the results in the literature [38][39][40]. The coercive magnetic field of the annealed or surface-treated CeO 2 nanoparticles and their core-shell structure is between 80 and 400 Oe.…”

“…The Ms-CeO 2 was 0.036 emu/g, 0.008 emu/g, 0.007 emu/g, and 0.012 emu/g of samples T1, T2, T3, and T4, respectively. All the values are higher than those of micrometer-scaled CeO 2 hollow spheres with various surface treatments [38][39][40].…”

Tunable fluorescence and magnetic properties of ceria- organic core- shell hollow structures

“…As for the ferromagnetic properties, in ceria, it has been pointed out that its magnetic behavior is closely related to the Ce 3+ concentration on the surface of the sample and the continuity of the defect layer [13,14,19]. In present study, the content of Ce 3+ on the sphere surface, the interior of the sphere and the surface organic layer varies with the reaction time.…”

“…There have been some reports investigating the magnetic properties of oxide hollow spheres [17,18]. Different processes have been utilized to control the surface structure and defects, including the reaction with acid or annealing, which can indeed increase the magnetic strength of the sample [19]. However, while increasing the amount of defects on the surface of the sphere, how to stabilize its state is a problem that needs to be considered.…”