Results 1 to 10 of about 731,100 (404)

Coordination-driven magnetic-to-nonmagnetic transition in manganese doped silicon clusters [PDF]

Phys. Rev. B 88, 115425 (2013), 2013
The interaction of a single manganese impurity with silicon is analyzed in a combined experimental and theoretical study of the electronic, magnetic, and structural properties of manganese-doped silicon clusters. The structural transition from exohedral to endohedral doping coincides with a quenching of high-spin states.
Hirsch, K., Issendorff, B. v., Kossick, M., Kümmel, S., Langenberg, A., Lau, J. T., Leppert, L., Möller, T., Richter, R., Rittmann, J., Terasaki, A., Vogel, M., Zamudio-Bayer, V.   +12 more
arxiv   +3 more sources

A Mechanism for Photoinduced Effects In Tetracyanoethylene-Based Organic Magnets [PDF]

Phys. Rev. Lett. 97, 247202 (2006), 2006
The photoinduced magnetism in manganese-tetracyanoethylene (Mn-TCNE) molecule-based magnets is ascribed to charge-transfer excitations from manganese to TCNE. Charge-transfer energies are calculated using Density Functional Theory; photoinduced magnetization is described using a model Hamiltonian based on a double-exchange mechanism.
Erdin, Serkan, van Veenendaal, Michel
arxiv   +3 more sources

Ab initio molecular dynamics study of manganese porphine hydration and interaction with nitric oxide [PDF]

Journal of Chemical Physics vol. 126, 024501 (2007), 2007
The authors use ab initio molecular dynamics and the density functional theory+U (DFT+U) method to compute the hydration environment of the manganese ion in manganese (II) and manganese (III) porphines (MnP) dispersed in liquid water. These are intended as simple models for more complex water soluble porphyrins, which have important physiological and ...
Craig J. Medforth, Kadish K. M., Kevin Leung, Turner P., Zahran Z. N.   +4 more
arxiv   +3 more sources

Manganese abundances in mercury-manganese stars [PDF]

Monthly Notices of the Royal Astronomical Society, 1999
We use exact curve-of-growth analysis and spectral synthesis to deduce the abundance of Mn from high signal-to-noise ratio visible-region echelle spectra of selected Mn i and MnII lines in 24 HgMn stars.
Allen, CS, Dworetsky, MM, Jomaron, CM
core   +5 more sources

Electrochemical lithium intercalation in nanosized manganese oxides [PDF]

Journal of Physics and Chemistry of Solids 67 (2006) 1258, 2007
X-ray amorphous manganese oxides were prepared by reduction of sodium permanganate by lithium iodide in aqueous medium (MnOx-I) and by decomposition of manganese carbonate at moderate temperature (MnOx-C). TEM showed that these materials are not amorphous, but nanostructured, with a prominent spinel substructure in MnOx-C.
Bacia, Maria, Darie, Céline, Ibarra-Palos, Alejandro, Proux, Olivier, Soupart, Jean-Bruno, Strobel, Pierre, Thiéry, François   +6 more
arxiv   +5 more sources

Disorder-Induced First Order Transition and Curie Temperature Lowering in Ferromagnatic Manganites [PDF]

Physical Review B, {\bf 73}, 214404 (2006), 2006
We study the effect that size disorder in the cations surrounding manganese ions has on the magnetic properties of manganites. This disorder is mimic with a proper distribution of spatially disordered Manganese energies. Both, the Curie temperature and the order of the transition are strongly affected by disorder.
B. Dabrowski, C. Zener, E. Dagotto, G. D. Mahan, J. Salafranca, L. Brey, L. M. Rodríguez-Martínez   +6 more
arxiv   +3 more sources

Three very young HgMn stars in the Orion OB1 Association [PDF]

Astrophys.J. 520 (1999) L55, 1999
We report the detection of three mercury-manganese stars in the Orion OB1 association. HD 37886 and BD-0 984 are in the approximately 1.7 million year old Orion OB1b. HD 37492 is in the approximately 4.6 million year old Orion OB1c. Orion OB1b is now the youngest cluster with known HgMn star members. This places an observational upper limit on the time
Brown A. G. A., David L. Lambert, de Geus E. J., Malysheva L. K., Michaud G., Moon T. T., Moon T. T., Napiwotzki R., Parenago P. P., Piskunov N. E., Pyatkes S. A., Smith K. C., Smith K. C., Vauclair G., Vincent M. Woolf   +14 more
arxiv   +5 more sources

Emission Lines in the Spectrum of the 3He Star 3 Cen A [PDF]

, 2000
Emission in the 4d - 4f transitions of MnII (multiplet 13, 6122-6132 Ang), in the 4f - 6g transitions of PII, and in 6149.5 Ang of HgII has been detected in the spectrum of the helium weak star 3 Centauri A (B5 III-IVp). Weaker emission from the same MnII multiplet is also seen in the hot, mild HgMn star 46 Aquila (B9 III).It is suggested that the ...
Carlsson M., Castelli F., Hubrig S., J. D. Landstreet, Johansson S., Landstreet J. D., Mathys G., Michaud G., S. L. S. Shorlin, Smith K. C., T. A. A. Sigut, van Noort M.   +11 more
arxiv   +4 more sources

The Efficient Removal of Calcium and Magnesium Ions from Industrial Manganese Sulfate Solution through the Integrated Application of Concentrated Sulfuric Acid and Ethanol

Metals, 2021
In the process of preparing high-purity MnSO4 from industrial MnSO4 solution, it is difficult to remove Ca2+ and Mg2+ due to their closely similar properties.
Houyang Chen, Kaituo Wang, Xianquan Ming, Feng Zhan, Yaseen Muhammad, Yuezhou Wei, Weijian Li, Haiqing Zhan   +7 more
doaj   +1 more source

Selective leaching of Mo from an off-grade gravity lead concentrate in Na2CO3 solution [PDF]

Journal of Mining and Metallurgy. Section B: Metallurgy, 2019
The selective leaching of Mo from an off-grade gravity lead concentrate was investigated in Na2CO3 solution using air as an oxidant. The leaching behaviors of Mo and Pb were predicted by the thermodynamic phase diagrams of Pb-Mo-C-H2O system.
Liu Z.-X., Luo Y.-T., Luo W.-B., Li B.-X., Wu X.-W.   +4 more
doaj   +1 more source