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Title: Magnetic order or charge-density wave in La2NiO4 by Mössbauer spectroscopy
Author: Fontcuberta i Griñó, Josep
Longworth, Gary
Goodenough, John B.
Keywords: Espectroscòpia Mössbauer
Mössbauer spectroscopy
Issue Date: 1984
Publisher: The American Physical Society
Abstract: Measurements of Mössbauer absorption spectra of 57 Fe : La 2 Ni O 4 at 297, 77, and 4.2 K provide evidence, at the lowest temperatures, of magnetic order in a sample containing 57 Fe 3 + -ion impurities and some La 2 + n Ni 1 + n O 4 + 3 n intergrowth. Mössbauer emission spectra of 57 Co : La 2 Ni O 4 at 77 and 4.2 K show magnetic order coexisting with paramagnetism in a sample containing a small concentration of 57 Co -ion impurities and some La 2 + n Ni 1 + n O 4 + 3 n intergrowth. These results are interpreted as evidence for competition between magnetic ordering and charge-density-wave formation among electrons of a narrow σ ∗ x 2 − y 2 band; intergrowths, impurities, and nonstoichiometry favor magnetic ordering.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 1984, vol. 30, núm. 11, p. 6320-6326.
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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