Magnetic excitations in 214-ruthenates

We discuss magnetic excitations in several 214-ruthenates as observed by inelastic neutron scattering. In the spin-triplet superconductor Sr2RuO4 the magnetic excitation spectrum is dominated by incommensurate peaks arising from Fermi surface nesting. Evidence that Sr2RuO4 is close to the correspond...

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Published in:Physica. C, Superconductivity Superconductivity, 2003-05, Vol.388-389, p.489-490
Main Authors: Braden, M, Friedt, O, Sidis, Y, Bourges, P, Pfeuty, P, Nakatsuji, S, Mao, Z, Kikugawa, N, Minakata, M, Maeno, Y
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Language:English
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Inelastic neutron scattering
Magnetic excitations
Ruthenates
Sr2RuO4
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description We discuss magnetic excitations in several 214-ruthenates as observed by inelastic neutron scattering. In the spin-triplet superconductor Sr2RuO4 the magnetic excitation spectrum is dominated by incommensurate peaks arising from Fermi surface nesting. Evidence that Sr2RuO4 is close to the corresponding spin-density wave (SDW) ordering is found in the temperature dependence of the spectrum which shows some scaling behavior. The corresponding SDW ordering is finally induced by substituting a small amount of Ru through Ti. The possible role of ferromagnetic fluctuations is further analyzed on the base on Ca-substituted samples which exhibit a strongly enhanced macroscopic magnetic susceptibility.
doi_str_mv 10.1016/S0921-4534(02)02390-0
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subjects Inelastic neutron scattering
Magnetic excitations
Ruthenates
Sr2RuO4
title Magnetic excitations in 214-ruthenates
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