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

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.

arXiv comment14 pages, 4 figures, accepted for publication in Phys. Rev. Lett

References in corpus (4)

• Colossal Effects in Transition Metal Oxides Caused by Intrinsic Inhomogeneities
• Colossal magnetoresistance in manganites as a multicritical phenomenon
• Competition between ferromagnetic and charge-orbital ordered phases in Pr${}_{1-x}$Ca${}_x$MnO${}_3$ for $x$=1/4, 3/8, and 1/2
• 59Co-NMR Probe for Stepwise Magnetization and Magnetotransport in SrCo6O11 with Metallic Kagome Layer and Triangular Lattice with Local Moments

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• Spin frustration and fermionic entanglement in an exactly solved hybrid diamond chain with the localized Ising spins and mobile electrons
• Exact evidence for the spontaneous antiferromagnetic long-range order in the two-dimensional hybrid model of localized Ising spins and itinerant electrons
• Constructing entanglement measures for fermions
• Time-of-flight elastic and inelastic neutron scattering studies on the localized $4d$ electron layered perovskite La${}_5$Mo${}_4$O${}_{16}$
• Observation of Magnetic Devil's Staircase-Like Behavior in Quasiperiodic Qubit Lattices