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  • 78.70  (1)
  • Alkali metal manganese selenides  (1)
  • 1
    ISSN: 1432-0630
    Keywords: 78.70 ; 73.40 ; 75.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The coupling of Cr to Fe in stacked Cr/Fe/Cr trilayers is studied by circular magnetic X-ray dichroism using fluorescence yield to monitor the absorption. From the dichroic spectra, we determine the thickness dependent average magnetic coupling of Cr to Fe for Cr layer thicknesses of 1, 2 and 3 ML. We compare our results to new calculated spectra. Additionally, all Cr spectra show significant contributions due to photon scattering processes at theL 2, 3 absorption edges depending on the degree of circular polarization.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0044-2313
    Keywords: Alkali metal manganese selenides ; alkali metal manganese tellurides ; crystal structure ; spin structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Alkali Metal Manganese Selenides and Tellurides - Synthesis, Crystal and Spin StructuresThe compounds Rb2Mn3Se4, Cs2Mn3Se4, Rb2Mn3Te4 and Cs2Mn3Te4 were synthesized by the reaction of alkali metal carbonates with chalcogen and Mn or MnCO3 in a stream of hydrogen charged with chalcogen.Structural investigations show that all compounds crystallize in isotypic atomic arrangements (Cs2Mn3S4-type, space group Ibam, Z = 4). Additionally neutron diffraction experiments were carried out and yielded the spin structures of Rb2Mn3Se4 and Cs2Mn3Se4 (Shubnikov space group Ibam').The structural related selenides ALiMnSe2 and ALiZnSe2 (A = K, Rb or Cs) were synthesized by analogous reactions. All these compounds are isotypic and crystallize in the BaZn2P2-structure type.
    Notes: Die Verbindungen Rb2Mn3Se4, Cs2Mn3Se4, Rb2Mn3Te4 und Cs2Mn3Te4 wurden durch Umsetzungen von Alkalimetallcarbonaten mit Mangan oder Mangancarbonat und Chalkogen in einem mit Chalkogen beladenen Wasserstoffstrom erhalten.Kristallstrukturuntersuchungen ergaben, daß alle Verbindungen isotyp kristallisieren (Cs2Mn3S4-Typ, Raumgruppe Ibam, Z = 4). Neutronenbeugungsuntersuchungen ermöglichten darüber hinaus die Bestimmung der antiferromagnetischen Spinstrukturen von Rb2Mn3Se4 und Cs2Mn3Se4 (Shubnikov-Raumgruppe Ibam').Die strukturverwandten Selenide ALiMnSe2 und ALiZnSe2 mit A = K, Rb oder Cs wurden über analoge Umsetzungen synthetisiert. Sie kristallisieren alle im BaZn2P2-Typ.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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