Modulation doping of double-exchange ferromagnetism in an antiferromagnetic manganite: Theory and Synthesis

ORAL

Abstract

In this talk we shall discuss the concepts that underlie modulation doping in the context of manganites, particularly the high bandwidth La$_{1-x}$Sr$_{x}$MnO$_{3}$, and how modulation doped structures are realized using oxide-MBE based techniques. The transport and magnetic properties of modulation doped antiferromagnetic digital superlattices of (LaMnO$_{3})_{1}$/(SrMnO$_{3})_{1}$ will be discussed in the context of theoretical ideas about exchange interactions in these materials going back to the seminal work of de Gennes, and compared to similar structures in other parts of the La$_{1-x}$Sr$_{x}$MnO$_{3}$ phase diagram.

*U. S. Department of Energy, BES, Contract No. DE-AC02-06CH11357; NIST, U.S. Department of Commerce.

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Authors

  • Anand Bhattacharya

    • Argonne National Laboratory
    • Materials Science Division and Center for Nanoscale Materials, Argonne National Laboratory

  • Tiffany Santos

    • Argonne National Laboratory
    • Center for Nanoscale Materials, Argonne National Laboratory

  • B.J. Kirby

    • NIST
    • National Institute of Standards and Technology Center for Neutron Scattering
    • National Institute of Standards and Technology
    • NIST, Gaithersburg

  • Sanjeev Kumar

    • IFW, Dresden

  • S.J. May

    • Argonne National Laboratory; Drexel University

  • J.A. Borchers

    • NIST, Gaithersburg.
    • NIST, Gaithersburg
    • NIST, Gaithersburg, MD

  • Brian Maranville

    • NIST, Gaithersburg.
    • NIST
    • NIST Center for Neutron Research

  • J. Zarestky

    • Oak Ridge National Laboratory

  • S.G.E. te Velthuis

    • Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

  • Jeroen van den Brink

    • IFW, Dresden
    • IFW Dresden
    • IFW Dresden, Germany