Room temperature ferromagnetic‐like response in “bulk” Y‐doped CeO₂

Abstract

Strong ferromagnetic-like response is observed at room temperature in "bulk"and nano-crystalline Y-doped CeO 2 . The saturation magnetization for "bulk" ($600 nm) crystallites of CeO 2 doped with 25 at.% Y is more than an order of magnitude higher compared to its nanocrystalline ($10 nm) counterpart. High frequency electron spin resonance and 89 Y nuclear magnetic resonance measurements indicate clustering of electronic defects in the "bulk" crystallites. The remarkable size dependence of the magnetic behavior likely originates from a collective magnetic response of defectlined nanodomain interfaces in the "bulk" crystallites, consistent with the giant orbital paramagnetism model.

Magnetic Properties of Rare Earth Doped SnO2, TiO2 and CeO2 Nanoparticles

“… (for x = 2; 4; 6; 8; 10% − = 33; 35; 40; 46; 55 meV, respectively). This leads to increasing of the magnetization M (see Figure ) what is in qualitative agreement with the experimental data of Rakhmatullin et al Lee et al reported also an increase of the magnetization M with increasing of Ce 3+ ions. But Lee et al showed that as the content of Y 3+ is enhanced, the concentration of Ce 3+ increases for and then begins to decrease for .…”

Enhanced Room‐Temperature Ferromagnetism in Composite CeO2/CeF3 Nanoparticles

“…Doping ceria with aliovalent cations such as rare earth or transition metal ions generates more vacancies and in a number of cases leads to better performance parameters as well as to the enhancement of room temperature ferromagnetism . A considerably lower number of publications are devoted to the studies of anion doping effects to ceria.…”