%AMei, Antonio [Department of Materials Science and Engineering Cornell University Ithaca NY 14853 USA]%AGray, Isaiah [School of Applied and Engineering Physics Cornell University Ithaca NY 14853 USA]%ATang, Yongjian [Department of Physics Cornell University Ithaca NY 14853 USA]%ASchubert, Jürgen [Peter Grünberg Institute (PGI‐9) and JARA‐Fundamentals of Future Information Technology Forschungszentrum Jülich GmbH Jülich 52425 Germany]%AWerder, Don [Department of Materials Science and Engineering Cornell University Ithaca NY 14853 USA, Cornell Center for Materials Research Cornell University Ithaca NY 14853 USA]%ABartell, Jason [School of Applied and Engineering Physics Cornell University Ithaca NY 14853 USA]%ARalph, Daniel [Department of Physics Cornell University Ithaca NY 14853 USA, Kavli Institute at Cornell for Nanoscale Science Ithaca NY 14853 USA]%AFuchs, Gregory [School of Applied and Engineering Physics Cornell University Ithaca NY 14853 USA, Kavli Institute at Cornell for Nanoscale Science Ithaca NY 14853 USA]%ASchlom, Darrell [Department of Materials Science and Engineering Cornell University Ithaca NY 14853 USA, Kavli Institute at Cornell for Nanoscale Science Ithaca NY 14853 USA]%BJournal Name: Advanced Materials; Journal Volume: 32; Journal Issue: 22; Related Information: CHORUS Timestamp: 2023-09-06 02:27:38 %D2020%IWiley Blackwell (John Wiley & Sons) %JJournal Name: Advanced Materials; Journal Volume: 32; Journal Issue: 22; Related Information: CHORUS Timestamp: 2023-09-06 02:27:38 %K %MOSTI ID: 10145769 %PMedium: X %TLocal Photothermal Control of Phase Transitions for On‐Demand Room‐Temperature Rewritable Magnetic Patterning %XAbstract

The ability to make controlled patterns of magnetic structures within a nonmagnetic background is essential for several types of existing and proposed technologies. Such patterns provide the foundation of magnetic memory and logic devices, allow the creation of artificial spin‐ice lattices, and enable the study of magnon propagation. Here, a novel approach for magnetic patterning that allows repeated creation and erasure of arbitrary shapes of thin‐film ferromagnetic structures is reported. This strategy is enabled by epitaxial Fe0.52Rh0.48thin films designed so that both ferromagnetic and antiferromagnetic phases are bistable at room temperature. Starting with the film in a uniform antiferromagnetic state, the ability to write arbitrary patterns of the ferromagnetic phase is demonstrated by local heating with a focused laser. If desired, the results can then be erased by cooling below room temperature and the material repeatedly re‐patterned.

%0Journal Article