Study of the Hydrogenation and Re-heating of Co-doped In₂O₃ based Diluted Magnetic Semiconductors

Abstract

Abstract. In this work, the Co 2+ ions doping effect on the magnetic behaviour of In 2 O 3 nanoparticles (NPs) has been discussed. The In 0.94 Co 0.06 O sample was prepared by solid state reaction method. According to XRD, the single crystalline phase was identified as the cubic bixbyite crystal structure and doping effect of prepared NPs. The magnetic study at room temperature (RT) revealed that the prepared Co doped In 2 O 3 sample had achieved overlapped paramagnetic (PM) properties defeating the diamagnetic (DM) properties of In 2 O 3 . Furthermore, it was found that the ferromagnetic (FM) is clearly induced by post-annealing in hydrogen atmosphere at 50 and 300 K. This study also depicts that the sample is finally returned to the PM state after re-heating.

Нанокомпозитные пленки Co-In-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-: синтез, структурные и магнитные свойства

“…In 2 O 3 привлекают внимание в связи с их возможным использованием в устройствах оптоэлектроники, спинтроники [18][19][20][21], газовой сенсорике [22][23][24][25].…”

In Situ Electron Diffraction Investigation of Solid State Synthesis of Co-In2O3 Ferromagnetic Nanocomposite Thin Films

“…Co-In 2 O 3 nanocomposites and cobalt-doped In 2 O 3 attract attention due to their possible use in optoelectronic and spintronic devices and gas sensors. [30][31][32][33][34][35][36] The study of the formation processes of Co-In 2 O 3 nanocomposite thin films was carried out directly in the column of a transmission electron microscope (TEM) by heating the film sample of In/Co 3 O 4 from room temperature to 600°C. In situ electron diffraction was used to study the structural transformations during the solid-state reaction.…”