Optical and magnetic properties of Er‐doped SnO₂ nanoparticles

Abstract

Er-doped SnO 2 nanoparticles were synthesized with varying Er concentration by a sol-gel method. X-ray diffraction (XRD) and high-resolution transmission electron microscopic studies reveal the crystalline nature of the nanoparticles and the crystallite size decreases with the increase of Er concentration in SnO 2 . For higher Er concentration, the evolution of Er 2 O 3 as a secondary phase is detected. The X-ray photoelectron spectroscopy (XPS) study depicts the existence of 4d level of Er along with a partially filled 4f state. Infrared photoluminescence (IRPL) measurement shows a strong emission peak at 1540 nm due to Er doping in the SnO 2 nanoparticles, which quenches after 3 at% of Er concentration. Magnetic measurement reveals the antiferromagnetic (AFM) behavior of the Er-doped samples, though there is an increase in magnetic moment with increase in Er concentration. Undoped SnO 2 shows a weak ferromagnetic interaction, which could be due to the presence of anionic defects (O vacancy). a status solidi www.pss-a.com physica ß

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

“…The authors reported an increase of the lattice parameters by Pr 3+ doping of SnO 2 NPs (). Sambasivam et al and Bhaumik et al observed an antiferromagnetic behavior with increasing Er content in SnO 2 NPs which could be explained by the magnetization M in Pr and Er doped TiO 2 and SnO 2 NPs.…”

Magnetic and transport properties of Mn0.02Sn0.98O2−δ thin films grown on p-Si varying O2 pressure

“…To prepare the target for laser ablation, we had used Mn 0.02 Sn 0.98 O 2 nanoparticles, prepared by simple sol-gel technique. 25,26 Those nanoparticles were pressurized to make pellet of 1 inch diameter for PLD target. Before deposition, PLD chamber was pumped with a base pressure of 10 À5 millibar.…”