"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)

*This work was supported in part by the Cornell Center for Materials Research with funding from the National Science Foundation MRSEC program (DMR-1719875). This work made use of the Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM), supported by the NSF (No. DMR-1539918), and the Cornell Nanoscale Facility, a member of the National Nanotechnology Coordinated Infrastructure (NNCI) supported by the NSF (Grant No. ECCS-1542081).

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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