Structural, optical and magnetic properties of pure and 3d metal dopant-incorporated SnO nanoparticles.

Dilute magnetic oxide semiconductors doped with transition metals have attracted significant attention both theoretically and experimentally due to their interesting and debatable magnetic behavior. In this work, we investigated the influence of Fe, Co and Ni doping on the structural, optical and magnetic properties of SnO nanoparticles, which were produced a simple sol-gel technique. Raman spectroscopy, XRD, XPS, TEM, FT-IR characterizations were performed to study the crystal structure and morphology of the pure and doped nanoparticles, which confirmed the tetragonal rutile structure of the SnO nanoparticles.

Crystal structure of monoclinic hafnia (HfO) revisited with synchrotron X-ray, neutron diffraction and first-principles calculations.

A study on the crystal structure of monoclinic HfO has been performed using synchrotron X-ray and neutron diffraction data separately, as well as a combination of both. The precision of the structural parameters increases significantly due to application of the neutron diffraction technique. The experimental oxygen positions in HfO, derived precisely, are visualized only by semi-local density functional calculations in terms of the calculated electronic band gap, but are not captured as accurately by using hybrid functionals.

Visible range optical absorption, Urbach energy estimation and paramagnetic response in Cr-doped TiO nanocrystals derived by a sol-gel method.

We have carried out a detailed study of the morphological, structural, optical and magnetic properties of Cr doped TiO nanocrystals with doping concentrations varying from 3 to 12 atomic weight%. The results obtained from transmission electron microscopy analysis, size-strain plots of all the Cr-doped samples and crystallite size estimation reveal the particle size of the prepared nanocrystals to be well below 10 nm, which is observed to exhibit a decreasing trend with an increase in the Cr dopant concentration. All the samples crystallize in the anatase tetragonal phase of TiO, which is confirmed from the Rietveld refinement of the X-ray diffraction patterns and the different modes present in the Raman spectra.

Structural, optical and magnetic behavior of sol-gel derived Ni-doped dilute magnetic semiconductor TiO nanocrystals for advanced functional applications.

Dilute magnetic semiconductors based on TiO2 nanocrystals are the most promising class of materials exhibiting unique optical and magnetic properties. In the present investigation, we have performed a systematic study on the structural, morphological, optical and magnetic behavior of Ni-doped TiO2, synthesized via a simple, cost-effective sol-gel route. X-ray diffraction patterns together with Raman spectra confirmed the tetragonal anatase phase of Ni-doped TiO2.

Defect mediated mechanism in undoped, Cu and Zn-doped TiO nanocrystals for tailoring the band gap and magnetic properties.

Oxide based dilute magnetic semiconductor materials have been of great interest over the years due to their potential use in spintronic devices. However, the variations in the magnetic behavior of the materials have raised concerns regarding the origin of ferromagnetic properties which still needs to be explored. Manipulation of magnetic behavior in oxide based dilute magnetic semiconductors has become a challenge due to the interplay of intrinsic defects present in the material.

Particle size dependence on magnetic and electrical properties of (Ni0.8Fe0.2)10C90 granular composites.

The granular structure and electrical transport behavior of ball milled magnetic permalloy particles and graphite forming (Ni0.8Fe0.2)10C90 granular composites have been reported.