Anomalous Hall Effect in Superparamagnetic Co-(La,Sr)TiO$_{3}$ Thin Films

ORAL

Abstract

We performed a systematic study of the magnetic properties and the Hall effect on 5{\%} cobalt doped (La, Sr)TiO$_{3 }$thin films grown by pulsed laser deposition. The superparamagnetic nature of the system is established by several protocols of magnetic measurements. Nevertheless, the anomalous Hall effect (AHE) is observed in the system, the Hall resistivity vs magnetic field loops being found to be identical to the magnetic hysterisis loops. This once again (Phys. Rev. Lett. 92, 166601 (2004)) highlights the limitations of AHE as a tool to test the intrinsic nature of ferromagnetism in a diluted magnetic system. Possible reasons for the origin of the AHE in our system are discussed.

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Authors

  • Shixiong Zhang

    Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • Weiqiang Yu

    Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • Satish B. Ogale

    Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • Sanjay R. Shinde

    Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • Darshan C. Kundaliya

    Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • Joshua S. Higgins

    Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • Ranjan Sahu

    Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • Richard L. Greene

    Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • Thirumalai Venkatesan

    Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

  • Wang-Kong Tse

    Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, University of Maryland

  • Shengyu Young

    Department of Materials Science and Engineering, University of Maryland, College Park

  • L. Salamanca-Riba

    Department of Materials Science and Engineering, University of Maryland, College Park, University of Maryland