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Träfflista för sökning "WFRF:(Mathieu F.) srt2:(2000-2004)"

Sökning: WFRF:(Mathieu F.) > (2000-2004)

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1.
  • Azad, Abul Kalam, 1966, et al. (författare)
  • Synthesis, structural and magnetic characterisation of the double perovskite A(2)MnMoO(6) (A = Ba, Sr)
  • 2004
  • Ingår i: Journal of Alloys and Compounds. - 0925-8388. ; 364:1-2, s. 77-82
  • Tidskriftsartikel (refereegranskat)abstract
    • A study of the crystallographic structure and magnetic properties of the double perovskites Ba2MnMoO6 and Sr2MnMoO6 in polycrystalline form has been carried out by means of neutron powder diffraction (NPD) and magnetization measurements. The Rietveld analysis of room temperature data shows that the Mn2+ and Mo6+ ions are B-site ordered, i.e. the structure is a NaCl-type ordered double perovskite. Ba2MnMoO6 crystallizes in the cubic space group Full-size image (<1 K) (a=8.1680(1)) and Sr2MnMoO6 crystallizes in the space group P42/n (a=7.9575(5), c=7.9583(9)). Bond valence sum (BVS) calculation revealed that these compounds have the valency pair of {Mn2+(3d5;t32ge2g), Mo6+(4d0)}. The magnetic measurements suggest that these compounds transform to an antiferromagnetic state below 10 K.
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  • Wiesner, K, et al. (författare)
  • The dynamic Auger-Doppler effect in HF and DF: control of fragment velocities in femtosecond dissociation through photon energy detuning
  • 2002
  • Ingår i: Chemical Physics Letters. - 0009-2614. ; 354:5-6, s. 382-388
  • Tidskriftsartikel (refereegranskat)abstract
    • The Auger-Doppler effect in the experimental spectra of HF and DF is presented. and the dynamics of ultra-fast dissociation in the core-excited state are discussed. The Doppler splitting of the atomic Auger peak is calculated and simulated using a classical model and a very good agreement is found between experiment and simulation. It is shown that the difference in photon energy relative to the resonance is transferred completely into the kinetic energy release (KER). This is expected to be a general phenomenon, but is clearly illuminated in the HF/DF case, Thus the fragment velocity can be controlled through photon energy detuning.
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  • Resultat 1-7 av 7

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