Enhanced magnetization in V Fe3−O4 nanoparticles

Abstract

Nanoparticles of VxFe3-xO4 with up to 33% vanadium doping (x=0 to 1) and a 9 nm diameter are investigated in order to determine the site preference of the vanadium and the magnetic behavior of the nanoparticles. The iron and vanadium L23-edge X-ray absorption spectroscopy (XAS) and Xray magnetic circular dichroism (MCD) spectra are used to identify that vanadium initially

Magnetic properties and heating efficacy of magnesium doped magnetite nanoparticles obtained by co-precipitation method

“…inversion degree δ), and thus https://doi.org/10.1016/j.jmmm.2018.11.127 many research studies have been devoted to correlations between these parameters and magnetic properties. In case of a nanoparticle magnetite, which in ideal case is considered as an inverse spinel (Fe 3+ ) [Fe 2+ Fe 3+ ]O 4 , numerous investigations were dealing with partial substitution of iron ions for a variety of other ions: magnetic 3d ions (Ni, Co, Mn, V) [13][14][15][16][17][18] or 4f ions (Gd, Dy, Ho, Tm, Yb) [19,20], or nonmagnetic (i.e. diamagnetic) ions (Y, Ga, Zn) [21][22][23][24].…”

“…diamagnetic) ions (Y, Ga, Zn) [21][22][23][24]. In addition, for the preparation of the above mentioned compounds many different synthesis techniques have been applied, including co-precipitation, thermal decomposition, mechanochemistry, hydrothermal route, solgel, and microemulsion [13][14][15][16][17][18][19][20][21][22][23][24]. Direct comparison of the obtained results is difficult since the applied synthesis method has a decisive impact on both cation distribution and nanoparticle size, and they both influence magnetic properties.…”

Experimental Determination of the Standard Gibbs Energy of Formation of Fe3–xVxO4 at 1473 K

“…Jin et al [15] fabricated epitaxial Fe 3-x V x O 4 (0 ≤ x ≤ 0.6) films by using reactive co-sputtering from pure Fe and V in a gas mixture of Ar and O 2 , and the magnetic and magnetotransport properties of the film spinels were studied at room temperature. Pool et al [16] synthesized nanoparticles of Fe 3-x V x O 4 with up to 33% vanadium substitution (x = 0 to 1) by mixing appropriate ratios of solutions of 0.5 mmol V(acac) 3 and Fe(acac) 3 , 1,2-hexadecanediol with benzyl ether, oleic acid(1.5 mmol), and oleylamine (1.5 mmol) under evacuated conditions. The site preference of the vanadium and the magnetic behavior of the nanoparticles were investigated through L23edge X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (MCD) spectra.…”