Magnetic ordering in Sr2RuO4 induced by nonmagnetic impurities

Details Magnetic ordering in Sr2RuO4 induced by nonmagnetic impurities Magnetic ordering in Sr2RuO4 induced by nonmagnetic impurities

2001-01-24

arxiv.org/abs/cond-mat/0101367v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4figures

Scientific paper

10.1103/PhysRevB.63.180504

We report unusual effects of nonmagnetic impurities on the spin-triplet superconductor Sr2RuO4. The substitution of nonmagnetic Ti4+ for Ru4+ induces localized-moment magnetism characterized by unexpected Ising anisotropy with the easy axis along the interlayer c direction. Furthermore, for x(Ti) > 0.03 magnetic ordering occurs in the metallic state with the remnant magnetization along the c-axis. We argue that the localized moments are induced in the Ru4+ and/or oxygen ions surrounding Ti4+ and that the ordering is due to their interaction mediated by itinerant Ru-4d electrons with strong spin fluctuations.

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