3 Aspects of magnetism in oxides 9 3.1 SrMnO3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 Crystal fields, moment formation and ordering . . . . . . . . . . . . . . . . . . 12 3.3 SrMnO3 revisited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.4 SrTcO3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.5...

we report the direct soft chemical synthesis and characterization of a family of face centered cubic (fcc) and partially ordered face centered tetragonal (fct) fept nanoparticles (nps) suitable for biomedical applications. both fcc and partially ordered fct-fept nps are synthesized by employing a simple polyol method. by using polyvinyl pyrolidone (pvp) as a stabilizer in various ratios during ...

In recent years, few-layer or even monolayer ferromagnetic materials have drawn a great deal of attention due to the promising integration two-dimensional (2D) magnets into next-generation spintronic devices. The SrRuO3 is rare example stable 2D magnetism under ambient conditions, but only weak ferromagnetism antiferromagnetism has been found. bi-atomic layer as another environmentally inert ma...

The preparation of copper manganite (hopcalite, Cu1.5Mn1.5O4), as a single phase, was achieved by using sustainable method green synthesis. This is based on the replacement conventional “brute force” ceramic recent “soft synthesis via egg white assisted one-step method. In other words, we present facile and rapid methodology to prepare nanocrystalline Cu1.5Mn1.5O4 spinel compared our previous w...

Cobalt-doped ZnO samples were prepared by both sol-gel and magnetron sputtering methods, respectively. Co atoms have incorporated into the ZnO lattice and located at the substitutional sites of the Zn atoms in all samples, while the sol-gel prepared Zn1-xCoxO samples show paramagnetism and the sputtering prepared CoyZn1yO samples appear ferromagnetism. The calculated O K-edge X-ray absorption n...

We demonstrate by high resolution low temperature electron energy loss spectroscopy (EELS) measurements that the long range ferromagnetic (FM) order in the vanadium- (V-)doped topological insulator Sb_{2}Te_{3} has the nature of van Vleck-type ferromagnetism. The positions and the relative amplitudes of two core-level peaks (L_{3} and L_{2}) of the V EELS spectrum show unambiguous change when t...

Nagaoka’s theorem on ferromagnetism in the Hubbard model with one electron fewer than half filling is generalized to the case where all possible nearest-neighbor Coulomb interactions ~the density-density interaction V , bond-charge interaction X , exchange interaction F , and hopping of double occupancies F8) are included. It is shown that for ferromagnetic exchange coupling (F.0) ground states...

The possibility to attain ferromagnetic properties in transparent semiconductor oxides such as ZnO is very promising for future spintronic applications. We demonstrate in this review that ferromagnetism is not an intrinsic property of the ZnO crystalline lattice but is that of ZnO/ZnO grain boundaries. If a ZnO polycrystal contains enough grain boundaries, it can transform into the ferromagneti...

Pulse laser deposited La2/3Sr1/3MnO3 ultrathin films on SrTiO3 substrates were characterized by polar and longitudinal Kerr magneto-optical spectroscopy. Experimental data were confronted with theoretical simulations based on the transfer matrix formalism. An excellent agreement was achieved for a 10.7 nm thick film, while a distinction in the Kerr effect amplitudes was obtained for a 5 nm thic...