Anisotropic transport and metamagnetism in microstructured CeRhIn$_5$

ORAL

Abstract

We present magnetoresistance data on high quality, focused ion beam (FIB)-fabricated microstructures of CeRhIn$_5$, a strongly correlated metal which is antiferromagnetic (AFM) below $T_N \sim 3.8$K due to the local 4f-moments of the cerium. Under applied pressure, the AFM gives way to an unconventional superconducting state in zero magnetic field. Additionally, the AFM, which exhibits a transverse spiral structure, undergoes a metamagnetic transition at $H_c \sim 2$T for magnetic fields applied perpendicular to the c-axis of the crystal. To effectively probe anisotropic properties of the electronic structure, we microstructure samples with extremely well-defined geometries. Microstructures of CeRhIn$_5$ prepared using FIB-techniques demonstrate quantum oscillations, large residual resistivity ratios, and good quantitative agreement with bulk data. We discuss how the AFM transition removes spin scattering anisotropically, and we show a- and c-direction resistivity measurements near the metamagnetic transition as well as its angular dependence.

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Authors

  • Kent R. Shirer

    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

  • Kimberly A. Modic

    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

  • Fedor F. Balakirev

    • National High Magnetic Field Laboratory, LANL, Los Alamos, New Mexico, USA

  • Ross D. McDonald

    • National High Magnetic Field Laboratory, LANL, Los Alamos, New Mexico, USA

  • Brad J. Ramshaw

    • National High Magnetic Field Laboratory, LANL, Los Alamos, New Mexico, USA

  • Eric D. Bauer

    • Los Alamos National Laboratory, Los Alamos, New Mexico, USA

  • Filip Ronning

    • Los Alamos National Laboratory, Los Alamos, New Mexico, USA

  • Philip J.W. Moll

    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany