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

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arxiv 0704.3025 v2 pith:ZZKTGCZQ submitted 2007-04-23 cond-mat.str-el

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 This is my paper
classification cond-mat.str-el
keywords conductionelectronsferromagneticfield-dependenceinteractionisingspinssrco6o11
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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