Development of the magnetic excitations of charge-stripe ordered La2-x Sr (x) NiO4 on doping towards checkerboard charge order
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Date
2013-05-01
Journal Title
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Publisher
Springer
Abstract
The magnetic excitation spectrums of charge stripe ordered La2-x Sr (x) NiO4 x = 0.45 and x = 0.4 were studied by inelastic neutron scattering. We found the magnetic excitation spectrum of x = 0.45 from the ordered Ni2+ S = 1 spins to match that of checkerboard charge ordered La1.5Sr0.5NiO4. The distinctive asymmetry in the magnetic excitations above 40meV was observed for both doping levels, but an additional ferromagnetic mode was observed in x = 0.45 and not in the x = 0.4. We discuss the origin of crossover in the excitation spectrum between x = 0.45 and x = 0.4 with respect to discommensurations in the charge stripe structure. © 2013, Springer.
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Keywords
Magnetism, Neutrons, Excitation, Scattering, Spin, Ferromagnetism
Citation
Freeman, P. G., Giblin, S. R., Hradil, K., Mole, R. A., & Prabhakaran, D. (2013). Development of the magnetic excitations of charge-stripe ordered La2-x Sr (x) NiO4 on doping towards checkerboard charge order. Journal of the Korean Physical Society, 62(10), 1453-1457. doi:10.3938/jkps.62.1453