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"Magnetic Etch-a-Sketch" using the 1st-order phase transition in FeRh

ORAL

Abstract

We demonstrate a novel approach for room-temperature rewritable magnetic patterning using the 1st-order phase transition from antiferromagnet (AF) to ferromagnet (FM) in FeRh. We employ epitaxial Fe0.52Rh0.48 films designed such that both phases are metastable at room temperature. Starting with the film in a uniform AF state, we write arbitrary patterns of FM phase using a focused pulsed laser with ~650 nm resolution. We image the FM patterns with anomalous Nernst microscopy and show that they are stable under magnetic field – at least up to 3 kOe – as well as elevated temperature up to ~315 K. The FM patterns can be written using a single picosecond laser pulse per pixel and can be fully erased by cooling the film below room temperature.

Ref: A. B. Mei et al, arXiv:1906.07239 (2019)

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Presenters

  • Isaiah Gray

    Cornell University, School of Applied and Engineering Physics, Cornell University

Authors

  • Isaiah Gray

    Cornell University, School of Applied and Engineering Physics, Cornell University

  • Antonio B Mei

    Cornell University, Department of Materials Science and Engineering, Cornell University

  • Yongjian Tang

    Cornell University, Department of Physics, Cornell University

  • Jürgen Schubert

    Peter Grünberg Institute (PGI-9)and Jara-Fundamentals of Future Information Technology, Forschungszentrum Jülich, Peter Grünberg Institute

  • Don Werder

    Cornell Center for Materials Research, Cornell University

  • Jason M Bartell

    Cornell University, Department of Materials Science and Engineering, Massachusetts Institute of Technology

  • Daniel Ralph

    Cornell University, Physics, Cornell University, Department of Physics, Cornell University, Department of Materials Science and Engineering, Cornell University

  • Gregory Fuchs

    Cornell University, School of Applied and Engineering Physics, Cornell University

  • Darrell Schlom

    Cornell University, Department of Materials Science and Engineering, Cornell University, Department of Materials Science and Engineering, Kavli Institute at Cornell for Nanoscale Science, Cornell University, Materials Science and Engineering, Cornell University, Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA, Platform for the Accelerated Realization, Analysis, & Discovery of Interface Materials (PARADIM), Cornell University