A study of the Mossbauer effect of Fe in magnetic materials subjected to high pressures is described. Specific systems reviewed are FeF2 , ct, s and -y phases of iron, invar, stainless steel and a metallic glass.

Introduction: Martian meteorite MIL03346 is described as an augite-rich cumulate rock with ~80%, ~3%, and ~21% modal phase proportions of augite (CPX), olivine and glassy mesostasis, respectively, and is classified as a nakhlite [1]. The Mossbauer spectrum for whole rock (WR) MIL 03346 is unusual for Martian meteorites in that it has a distinct magnetite subspectrum (~7% subspectral area) [2]. ...

Homogeneous single crystals of EuO, Eu rich EuO and Gd doped EuO have been obtained and characterized by X-ray, microprobe analysis;Mossbauer, infrared spectroscopy and resistivity measurements versus temperature. Photoconductivity, Hall effect, optical and magnetic measurements are reported. They are interpreted within a simple model taking into account Coulomb, kinetic and exchange energies a...

The preparation of a fluid of cobalt ferrite particles having a size varying from 2 to 5nm is described. This bas been achieved by using functionalized surfactants. The size of cobalt femte particles decreases when the total reactant concentration decreases. The magnetic properties are described with magnetization curves and "Fe mossbauer spectroscopy. It is demonstrated that these particles ar...

The B̃-X̃ laser-induced-fluorescence spectrum of jet-cooled isopropoxy radical (i-C3H7O[middle dot]) has been recorded. Using an isolated state model the observed rotational and fine structure of the origin band has been well simulated to determine rotational constants for both the X̃ and B̃ states and the electron spin-rotation constants of the X̃ state. The line intensities are well simulated with...

. High-field susceptibility results ~re presented for MOssbauer measurements on iron at low temperatures m field.s up ~o 13~ kOe and magnetIZatIOn measurements on iron and nickel single crystals in fields up to 148 kOe WIth vibratmg sample magneto~eters. The Mossbauer measurements give the hyperfine field H n = Hint(HO-1!I:!M) +AH, where !lint IS the hyperfine field at zero applied field,Ho is ...

Three electronic absorption systems for C5 at 511, 445, and 232 nm and one for C6, C8, and C9 centered at 228, 259, and 288 nm have been observed in the gas phase. The C5 chain was produced in both discharge and ablation sources and detected using resonant two-color two-photon ionization spectroscopy involving 10.5 eV photons. The decay of the excited singlet electronic states indicates fast in...

11 Pillinger, W. L., and J. A. Stone, Mossbauer Effect in Ferredoxin, E. I. du Pont de Nemours and Company, Savannah River Laboratory, Aiken, S.C., AEC Report DP 878 (1964). 12 Figgis, B. N., and J. Lewis, in Modern Coordination Chemistry, ed. J. Lewis and R. G. Wilkins (New York: Interscience, 1960), p. 406. 13 Frauenfelder, H., The Mossbauer Effect (New York: W. A. Benjamin, Inc., 1962). 14 F...

Two-dimensional Fourier transform electronic spectra were recorded for the LH3 light harvesting complex. The spectra reveal the weak coupling between B800 molecules, the ultrafast dynamics within B820 and energy flow from B800 to B850.

The putative [6Fe-6S] prismane cluster in the 6-Fe/S-containing protein from Desulfovibrio vulgaris, strain Hildenborough, has been enriched to 80% in "Fe, and has been characterized in detail by S, X-, Pand Q-band EPR spectroscopy, parallel-mode EPR spectroscopy and high-resolution 57Fe Mossbauer spectroscopy. In EPR-monitored redox-equilibrium titrations, the cluster is found to be capable of...