| AVS 62nd International Symposium & Exhibition | |
| Magnetic Interfaces and Nanostructures | Tuesday Sessions |
| Session MI-TuM |
| Session: | Oxides, Fluorides, and Spin Structures |
| Presenter: | Yayoi Takamura, University of California, Davis |
| Authors: | Y. Takamura, University of California, Davis B. Li, University of California, Davis R.V. Chopdekar, University of California, Davis E. Arenholz, Lawrence Berkeley National Laboratory A. Mehta, SLAC National Accelerator Laboratory M.D. Biegalski, Oak Ridge National Laboratory H.M. Christen, Oak Ridge National Laboratory |
| Correspondent: | Click to Email |
Perovskite-structured oxides possess a wide range of intriguing and technologically relevant functional properties including ferromagnetism, ferroelectricity, and superconductivity. Furthermore, the interfaces of perovskite oxides have been shown to exhibit unexpected functional properties not found in the constituent materials. These functional properties arise due to various structural and chemical changes as well as electronic and/or magnetic interactions occurring over nanometer length scales at the interfaces, and they have the potential to be harnessed to enable new, more versatile, and energy efficient devices. In particular, magnetic exchange coupling at ferromagnetic/ antiferromagnetic (FM/AFM) and FM/FM interfaces are crucial due to their applications in magnetic technologies such as magnetic read heads and nanostructured permanent magnets. In this talk, we report on a unique spin-flop coupling observed at FM La0.7Sr0.3MnO3 (LSMO)/AFM La0.7Sr0.3FeO3 (LSFO) interfaces and contrast these interfaces to FM/FM interfaces consisting of hard FM La0.7Sr0.3CoO3 (LSCO) and soft FM LSMO where exchange-spring behavior has been observed. Detailed structural and magnetic characterization of the individual layers was carried out using a combination of resonant x-ray reflectometry and element-specific soft x-ray magnetic spectroscopy, which provide more insight into interfacial effects over conventional characterization techniques such as bulk magnetometry. Our results indicate that the complex interplay between the charge, lattice, spin and orbital degrees of freedom at perovskite oxide interfaces provides a versatile route to control magnetic switching behavior as required for advanced magnetic device applications.