Incommensurate magnetic ordering in Sr2Ru(1-x)TixO4.
In Sr2RuO4 the spin excitation spectrum is dominated by incommensurate fluctuations at q = (0.3 0.3q(z)), which arise from Fermi-surface nesting. We show that upon Ti substitution, known to suppress superconductivity, a short range magnetic order develops with a propagation vector (0.307 0.307 1). In Sr2Ru0.91Ti0.09O4, the ordered moment points along the c direction. This finding shows that superconducting Sr2RuO4 is extremely close to an incommensurate spin density wave instability.
Braden
M
M
Forschungszentrum Karlsruhe, IFP, Postfach 3640, D-76021 Karlsruhe, Germany. braden@ph2.uni-koeln.de
Friedt
O
O
Sidis
Y
Y
Bourges
P
P
Minakata
M
M
Maeno
Y
Y