Tailoring the magnetization behavior of Co-doped titanium dioxide nanobelts

Synthesis and characterization of one-dimensional Co-doped titanate nanostructures prepared in the presence of chitosan

“…As seen from the above data, the morphology of products formed in the presence of chitosan are similar to the morphology of typical elongated Co-doped titania structures that were previously obtained by several authors [5,9,13,16]. Chitosan as the organic reagent has no effect on the structural growth of titania at hydrothermal treatment of CoTiO 3 powder.…”

“…As diluted magnetic semiconductor (DMS), Co-doped titania has displayed interesting magnetic behavior at low cobalt concentration [10][11][12][13][14][15][16][17][18]. However, the chemical nature of the ferromagnetic phase in Co-doped titania is subject to discussion.…”

“…However, the chemical nature of the ferromagnetic phase in Co-doped titania is subject to discussion. Chong et al [16] proposed that the main factor in inducing ferromagnetic ordering is the presence of oxygen vacancies. Additionally, the crystal structure of titania plays a direct role in influencing the formation of different types of vacancy.…”

Theoretical investigations of magnetic properties of ferromagnetic single‐layered nanobelts

“…Following these successful fabrications, other belt‐like nanostructures have also been fabricated by various methods 4–23. The as‐synthesized oxide or non‐oxide semiconductor nanobelts are pure, structurally uniform, and single crystalline, and most of them are free of defects such as vacancies and dislocations unless consciously doped 1–23. They have a rectangle‐like cross‐section with typical widths of several hundred nanometers, width‐to‐thickness ratios of 5–10, and lengths of hundreds of micrometers.…”

“…The belt‐like nanostructures have been expected to be important building blocks for nanodevices and to offer exciting opportunities for both fundamental research and technological applications. Some of their physical properties have been investigated experimentally 11–23. Some nanobelts are ferromagnetic (FM) and the Curie point can even be above room temperature 15–22.…”