Synthesis and characterization of Mn-, La-Mn- and La-Ca-Mn-citrates as precursors for LaMnO3 and La1−xCaxMnO3

preparation and characterization of new co-fe and fe-mn nano catalysts using resol phenolic resin and response surface methodology study for fischer-tropsch synthesis

کاتالیزورهای co-fe-resol/sio2و fe-mn-resol/sio2 با استفاده از روش ساده و ارزان قیمت همرسوبی تهیه شدند. از رزین پلیمری resol در فرآیند تهیه کاتالیزور استفاده شد.

PREPARATION AND CHARACTERIZATION OF Mn (III) COMPLEXES

We have prepared and characterized a few Mn (III) complexes by using a few bidentate and tridentate ligands. Spectra of the manganese (III) ion in a variety of molecular environments are reported. On the basis of solution spectra, some of these complexes seem to be typically distorted

Magnetoresistance and phase composition of La-Sn-Mn-O systems

Mixed valency in polynuclear Mn/Mn, Mn/Mn and Mn/Mn/Mn clusters: a foundation for high-spin molecules and single-molecule magnets

Mixed-valent Mn/O dinuclear and polynuclear molecular compounds containing Mn are almost without exception trapped valence. Large differences between the strengths of the exchange interactions within MnMn, MnMn and MnMn pairs lead to situations where MnMn interactions, the strongest of the three mentioned and antiferromagnetic in nature, dominate the intramolecular spin alignments in trinuclear...

Clustering of Mn in (Ga,Mn)As

Clustering of (Ga,Mn)As is studied with the supercell density-functional calculations using the projector augmentedwave method. We find large binding energies for a single substitutional Mn atom to existing dimers and trimers giving rise to trimer and tetramer formation. For larger clusters this binding energy drops. In all cases studied, ferromagnetic alignment is found to be energetically mor...