Special Issue on Quantum Spin Ice and Liquid in Geometrically Frustrated Magnets; Guest Editors: Ying-Jer Kao (National Taiwan University), Shigeki Onoda (RIKEN, Japan) and Satoru Nakatsuji (University of Tokyo, Japan)No Access

Magnetic Response of Itinerant Spin Ice

Masafumi Udagawa

Masafumi Udagawa

Department of Physics, Gakushuin University, Mejiro, Toshima-ku, Tokyo 171-8588, Japan

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https://doi.org/10.1142/S2010324715400044Cited by:7 (Source: Crossref)

Abstract

We have studied the magnetic response of itinerant spin ice, by applying the cluster dynamical mean field theory (CDMFT) to the Ising Kondo lattice model on a pyrochlore lattice. As a result, we found a characteristic interplay between magnetization curve and spin ice correlation developed at low temperatures. The magnetization develops a kink-like structure at the 2/3 of its saturation value, reminiscent of kagome ice plateau. Accompanied with the magnetization process, the monopole density shows nonmonotonic magnetic field dependence with a clear minimum, reflecting a subtle energetics of spin configurations. The spin ice correlation also affects the transport properties of the system, and brings about negative magnetoresistivity with its slope strongly dependent on the magnitude of spin ice correlation. We discuss these behaviors in comparison with the magnetic response observed in Pr₂Ir₂O₇.

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