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  • 1970-1974  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 7 (1974), S. 311-311 
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The crystal structure of MnSeO4.H2O has been refined by least-squares methods from X-ray powder diffraction data.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 13 (1971), S. 137-148 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Zusammenfassung Wir haben aus Neutronenbeugungsmessungen an ErFe2-Pulver im Temperaturbereich 4,2°K bis 700°K die magnetische Struktur bestimmt und die Untergittermagnetisierung der Er- und Fe-Untergitter gemessen. ErFe2 ordnet ferrimagnetisch mit einer antiparallelen Orientierung der Er- und Fe-Ionen. Der Neelpunkt liegt bei 600°K. Die Sättigungsmomente bei 4.2°K wurden zuμ(Fe)=1,97μ B undμ(Er)=8,47μ B bestimmt. Die Kopplung der beiden Untergitter erfolgt durch eine antiparallele Spin-Spin-Wechselwirkung. Die Untergittermagnetisierung für die Erbium-Ionen kann in einen induzierten Anteil bei hohen Temperaturen und eine spontane Magnetisierung bei niederen Temperaturen zerlegt werden.
    Abstract: Résumé La structure magnétique de ErFe2 a été déterminée par des mesures de diffraction de neutrons d’un échantillon pulverisé pour des températures entre 4.2 K et 700 K. ErFe2 est ferrimagnétique en dessous de 600 K, les ions Er et Fe s’orientant antiparallèlement. L’aimantation des sous-réseaux Er et Fe a été determinée. Les moments de saturation à 4.2 K ont été évalués àμ(Fe)=1.97μ B etμ(Er)=8.47μ B. Le couplage entre les sous-réseaux est dû à une interaction spin-spin antiparallèle des ions Er et Fe. L’aimantation du sous-réseau des ions Er peut être divisée en une partie induite à hautes températures et une aimantation spontanée à basses températures.
    Notes: Abstract The magnetic structure of ErFe2 has been determined from neutron diffraction measurements on a powderd sample in the temperature region between 4.2°K and 700°K. ErFe2 exhibits ferrimagnetic ordering below 600°K with the Er- and Fe-ions being antiparallel oriented. The separate sublattice magnetisations of the Er- and Fe-sublattices have been determined. The saturation moments at 4.2°K have been found to beμ(Fe)=1.97μ B andμ(Er)=8.47μ B. The coupling between the two sublattices is by an antiparallel spin-spin interaction of the Er and Fe ions. The temperature dependence of the sublattice magnetization of the Er-ions is explained by a separation into two parts: an induced magnetization at high temperatures and a spontaneous magnetization at lower temperatures.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 34 (1971), S. 515-517 
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Branch development inP. radiata seedlings and young trees is affected by the level of nitrogen supply. A marginal nitrogen deficiency reduces branch and stem diameter growth much more than it does stem height growth. On soils of low N content mature trees have better than normal form. Fertilizing young trees may have undesirable side effects such as promoting branch growth and reducing leader dominance.
    Type of Medium: Electronic Resource
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