A comparison of methods for the determination of the magnetocrystalline anisotropy constant in Fe$_3$O$_4$ nanoparticles

ORAL

Abstract

The dynamics of the relaxation behavior of superparamagnetic nanoparticles is governed by many factors such as the anisotropy constant, composition, size and nature of coating of the nanoparticles particles. We report values of the anisotropy constant ($K$) for magnetite nanoparticle (size $\sim$12 nm) coated with dextran and suspended in water by dc and ac magnetization measurements, Mössbauer spectroscopy and the temperature dependent specific absorption rate (SAR) measurement. The magnetite nanoparticles were synthesized by co-precipitation and characterized by x-ray diffraction (XRD) and Transmission electron microscopy (TEM). The $K$ values from dc magnetic susceptibility, M\"{o}ssbauer spectroscopy, ac magnetic susceptibility, and that obtained by temperature dependent SAR measurements are all within the range of the accepted values in the literature. Merits and demerits of the four methods of determining $K$ values will be discussed. We will also report on the temperature dependence of the anisotropy constant and the N\'{e}el relaxation constant.

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Authors

  • Ronald Tackett

    Department of Physics, Kettering University, Kettering University

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student