Magnetism of TiO and TiO2 nanoclusters

Abstract

Nanoclusters of rocksalt TiO, anatase TiO 2 , and rutile TiO 2 were produced by cluster deposition and examined with transmission-electron microscopy, x-ray diffraction, and magnetization measurements. The clusters are all magnetic at room temperature, but the magnetization is structuredependent. The hysteresis loops show coercivities that are of the order of 100 Oe and all films show a preferential in-plane magnetization direction. The size dependence of the magnetization was investigated for rutile clusters with average sizes from about 15 to 40 nm. The analysis of the measurements indicates that the magnetism is predominantly located near the surface of the clusters and characterized by a nominal value of 7.6 B / nm 2 .

Development of novel magnetic-dielectric ceramics for enhancement of reflection loss in X band

“…The CCTO particles have very weak magnetic features as shown in VSM curve. The similar result was obtained in previous literatures [23,24].…”

Ab-initio study of free standing TiO2 clusters: Stability and magnetism

“…[12][13][14] A wide plethora of reported studies already exist on the spectroscopic analysis of TiO 2 metal dioxide clusters giving information about the structure and bonding in clusters. 15 It is being addressed the electronic structure information about (TiO 2 ) n clusters with n ¼ 1-10 using photoelectron spectroscopy (PES) and the magnetism for anatase phase clusters has been observed experimentally by Wei et al 16 Chiodo et al 17 and Mo et al 18 have studied the electronic, structural, and optical properties of titanium dioxide clusters employing ab-initio calculations. Relative stability of (TiO 2 ) n cluster for different symmetries was studied by Albaret et al using Density Functional Theory (DFT).…”

EPR, spectroscopic and photocatalytic properties of N-modified TiO2 prepared by different annealing and water-rinsing processes

“…Recently, ferromagnetically ordered states in titanium oxides as well in titanium carbide have been observed [14,43]. The two resonance lines (designated as line 1 and line 2) observed in low magnetic fields in sample [TiO 2 /400 C rinsed] which disappear below 50 K are assumed to arise from magnetic agglomerates (Fig.…”