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arXiv · 0704.3025

Two-Staged Magnetoresistance Driven by Ising-like Spin Sublattice in SrCo6O11

S. Ishiwata·I. Terasaki·F. Ishii·N. Nagaosa·H. Mukuda·Y. Kitaoka·T. Saito·M. Takano
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Abstract

A two-staged, uniaxial magnetoresistive effect has been discovered in SrCo6O11 having a layered hexagonal structure. Conduction electrons and localized Ising spins are in different sublattices but their interpenetration makes the conduction electrons sensitively pick up the stepwise field-dependence of magnetization. The stepwise field-dependence suggests two competitive interlayer interactions between ferromagnetic Ising-spin layers, i.e., a ferromagnetic nearest-layer interaction and an antiferromagnetic next-nearest-layer interaction. This oxide offers a unique opportunity to study nontrivial interplay between conduction electrons and Ising spins, the coupling of which can be finely controlled by a magnetic field of a few Tesla.

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S. Ishiwata, I. Terasaki, F. Ishii, N. Nagaosa, H. Mukuda, Y. Kitaoka, T. Saito, M. Takano. 2007-04-24. Two-Staged Magnetoresistance Driven by Ising-like Spin Sublattice in SrCo6O11. https://doi.org/10.1103/physrevlett.98.217201

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