Magnetic Nanocheckerboards with Tunable Sizes in the Mn-Doped CoFe$_{2}$O$_{4}$ Spinel

ORAL

Abstract

In the Mn-doped CoFe$_{2}$O$_{4}$ spinel, a highly ordered array of two types of rectangular nanorods, $\sim $300 nm in length and a few nanometer in size, is achieved through chemical phase separation mediated by cooperative Jahn-Teller distortions. At room temperature, the magnetic nanorods with composition close to CoFe$_{2}$O$_{4}$ interlace with the paramagnetic counterparts and form a highly organized checkerboard pattern in the cross section. The checkerboard size, varying in the range of $\sim $3 nm and $\sim $80 nm, is tunable with composition as well as with the isothermal annealing time This may be of potential significance to the next generation magnetic storage. The magnetic nanocheckerboards exhibit a nearly ideal configuration for perpendicular recording media.

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Authors

  • Chenglin Zhang

    • Rutgers University
    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • C.M. Tseng

    • Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan

  • C.H. Chen

    • Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan
    • Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan

  • S. Yeo

    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • Y.J. Choi

    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • S.-W. Cheong

    • Rutgers University
    • RCEM and Rutgers University, Piscataway, NJ
    • Rutgers University (Deparment of Physics)
    • Rutgers Univ.
    • Department of Physics and Astronomy, Rutgers University
    • Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials and Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854