Abstract
For spintronic devices, the room temperature ferromagnetism in dilute semiconductors is essential. We report here the successful preparation of (In1−xGdx)2O3 [x = 0, 0.05, 0.10] by auto-combustion method. The powder XRD and SAED data confirmed the formation of single-phase cubic bixbyite In2O3. The particles are in the range of 18–22 nm size. Raman spectra showed doping of Gd3+ ions in the In2O3 lattice. The 3+ valence state of In and Gd was confirmed from XPS and XAS techniques. The magnetic hysteresis loop and EPR spectra showed the weak ferromagnetism in (In0.90Gdn0.10)2O3, while the pure In2O3 is diamagnetic and (In0.95Gdn0.05)2O3 is paramagnetic. To our knowledge, it is the first study to report the RTFM in Gd-doped In2O3 nanoparticles.
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