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- W2154987316 abstract "KFeF3, with perovskite structure. is known to be antiferromagnetic below TN = 115°K. The ferrous ion has some unquenched angular momentum, which plays an important role in magnetic ordering. Using a single ion Hamiltonian which includes spin-orbit and exchange contributions, it is shown that the sublattice magnetization can only be stabilized in one of two possible directions. The Hamiltonian is treated in a self-consistent way, and shown to be consistent with Mossbauer spectra below TN, and a value of the exchange constant J is obtained. A consideration of this and previous estimates leads to J/k ≈ 7°k.Es ist bekannt, das KFeF3 mit der Perowskit-Struktur unterhalb TN = 115°K antiferromagnetisch ist. Das Fe++-Ion besitzt einen nicht geloschten Drehimpuls, der in der magnetischen Ordnung eine wichtige Rolle spielt. Mit einer Hamiltonfunktion eines einzelnen Ions, die Spin-Bahn- und Austauschterme einschliest, wird gezeigt, das die Untergitter- Magnetisierung in eine von zwei moglichen Richtungen stabilisiert werden kann. Die Hamiltonfunktion wird mit einem selbstkonsistenten Verfahren behandelt und stimmt mit dem Mosbauer-Spektrum unterhalb Tn uberein. Dadurch wird die Austauschkonstante J erhalten. Die Berucksichtigung dieses und fruherer Resultate ergibt J/k ≈ 7°K." @default.
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- W2154987316 date "1968-01-01" @default.
- W2154987316 modified "2023-09-28" @default.
- W2154987316 title "Exchange and spin-orbit coupling in KFeF3" @default.
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- W2154987316 doi "https://doi.org/10.1002/pssb.19680260107" @default.
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