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- W2099694901 abstract "Mit Neutronenbeugung wurden die Atomparameter von Coiumbit, FeNb2O6 und MnNb2O6, verfeinert. Tieftemperaturmessungen an FeNb2O6 ergaben magnetische Reflexe hkl mit k 1/2zahlig. Aus den Reflexintensitäten ergab sich eine kollineare magnetische Struktur documentclass{article}pagestyle{empty}begin{document}$ overrightarrow {rm S} _1 = - overrightarrow {rm S} _2 = overrightarrow {rm S} _3 = overrightarrow {rm S} _4 $end{document} für die 4 Atome der halben magnetischen Zelle. Die Momente liegen parallel zur x-Achse, φa = 0°; das Moment beträgt μ = 3.84°B. Beim MnNb2O6 sind bei 2,0°K Reflexe 010, 101 und 210 zusätzlich beobachtet worden. Hier kann auf Grund der beobachteten Intensitäten unterschieden werden zwischen einem kollinearen Modell G: documentclass{article}pagestyle{empty}begin{document}$ overrightarrow {rm S} _1 = - overrightarrow {rm S} _2 = overrightarrow {rm S} _3 = - overrightarrow {rm S} _4 $end{document} mit Komponenten Gx, Gz (φa = 10°, φc = 80°) und einem nicht-kollinearen Modell CX (documentclass{article}pagestyle{empty}begin{document}$ overrightarrow {rm S} _1 = overrightarrow {rm S} _2 = - overrightarrow {rm S} _3 = - overrightarrow {rm S} _4 $end{document}) mit Gy zugunsten des ersteren. The atom parameters of columbite. FeNb2O6 and MnNb2O6, are refined by neutron diffraction. Low temperature measurements of FeNb3O6 provided magnetic reflections hkl with k half integer. From the intensities of the reflections a collinear magnetic structure documentclass{article}pagestyle{empty}begin{document}$ overrightarrow {rm S} _1 = - overrightarrow {rm S} _2 = overrightarrow {rm S} _3 = overrightarrow {rm S} _4 $end{document} results for the 4 atoms of the half of the magnetic unit cell. The moments lie parallel to the x-axis, φa = 0°. The moment is μ = 3.84 μB. For MaNb2O6 at 2.0°K reflections 010, 101 and 210 are observed additionally. From the observed intensities it is possible to distinguish a collinear model G: documentclass{article}pagestyle{empty}begin{document}$ overrightarrow {rm S} _1 = - overrightarrow {rm S} _2 = overrightarrow {rm S} _3 = - overrightarrow {rm S} _4 $end{document} with components Gx, Gz (φa = 10°, φc = 80°), and a non-collinear model Cx (documentclass{article}pagestyle{empty}begin{document}$ overrightarrow {rm S} _1 = overrightarrow {rm S} _2 = - overrightarrow {rm S} _3 = - overrightarrow {rm S} _4 $end{document}) with Gy in favour of the first one." @default.
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- W2099694901 date "1971-02-01" @default.
- W2099694901 modified "2023-09-29" @default.
- W2099694901 title "Magnetische Struktur von Columbit, FeNb2O6" @default.
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- W2099694901 doi "https://doi.org/10.1002/zaac.19713800202" @default.
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