Static and Dynamic Magnetic Properties of Cu-Based Organic-Inorganic Hybrid Perovskite Single Crystals

ORAL

Abstract

Low dimensional magnetism reported in Van der Waals (VdW) materials has sparked a renewed interest in spintronic applications in recent years, focusing on two dimensional spin waves and antiferromagnetic magnon generation. We investigate Cu-based hybrid organic-inorganic perovskites which represent an intriguing class of quasi two-dimensional layered materials, with far greater chemical (and magnetic) variability than their VdW counterparts, making them potentially suited for spintronic applications. Here we examine the static and dynamic magnetic properties of (C6H5CH3CH2NH3)2CuCl4, (CH3CH2NH3)2CuCl4, and (C6H5CH3CH2NH3)2CuBr4 single crystals using SQUID magnetometry and ferromagnetic resonance (FMR) spectroscopy, respectively. Static magnetization and susceptibility measurements reveal the effects of organic cation and halide substitution on critical ordering behavior. Dynamic FMR measurements show spin-wave propagation in the paramagnetic region above the critical temperature as a result of strong intralayer exchange coupling. At the critical temperature, asymmetric FMR absorption occurs as interlayer exchange becomes relevant and additional spin-wave modes are manifested.

*Work at NC State was supported by the Department of Energy, Office of Science, grant No. DE-SC0020992. Device fabrication at NC State was partially supported by funding from the National Science Foundation (NSF), ECCS-1933297. Work at NREL are supported through the Center for Hybrid Organic Inorganic Semiconductors for Energy (CHOISE), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences.

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Presenters

  • Andrew H Comstock

    • North Carolina State University

Authors

  • Andrew H Comstock

    • North Carolina State University

  • Haipeng Lu

    • The Hong Kong University of Science and Technology

  • Eric Vetter

    • North Carolina State University

  • RUYI SONG

    • Duke University

  • Josh Chou

    • Massachusetts Institute of Technology

  • Joseph N Sklenar

    • Wayne State University, Detroit, MI, United States
    • Wayne State University

  • Luqiao Liu

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  • Wei Zhang

    • Oakland University
    • Oakland University, Rochester, MI, United States

  • Volker Blum

    • Duke University

  • Matthew C Beard

    • National Renewable Energy Laboratory

  • Dali Sun

    • North Carolina State University