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Morphology and magnetic properties of ultrafine ZnFe2O4 particles

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Abstract

Well-crystallized ultrafine ZnFe2O4 particles of several nanometers in size have been prepared by the coprecipitation method, and their particle morphology and magnetic properties, especially at low temperatures, examined. Room-temperature X-ray diffraction, transmission electron microscopy, magnetization measurements at various temperatures from 300 K to 4.2 K, and Mössbauer spectroscopy at various temperatures from 300 K to 4.2 K, and at 4.2 K with a longitudinal magnetic field of 16.4 kOe applied have been employed. The formation of short-range and long-range magnetic order in small ZnFe2O4 particles above and below approximately 30 K is discussed. Below 30 K, the appearance of spontaneous magnetization and its hysteretic property is confirmed for small ZnFe2O4 particles.

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Authors and Affiliations

  1. Tokyo Engineering University, 192, Hachioji, Tokyo, Japan

    T. Sato

  2. Research Institute for Scientific Measurements, Tohoku University, 980, Sendai, Japan

    K. Haneda

  3. NTT Technology Transfer Corporation, Musashino, 180, Tokyo, Japan

    M. Seki

  4. NTT Applied Electronics Laboratories, Musashino, 180, Tokyo, Japan

    T. Iijima

Authors
  1. T. Sato
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  2. K. Haneda
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  3. M. Seki
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  4. T. Iijima
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Sato, T., Haneda, K., Seki, M. et al. Morphology and magnetic properties of ultrafine ZnFe2O4 particles. Appl. Phys. A 50, 13–16 (1990). https://doi.org/10.1007/BF00323947

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  • DOI: https://doi.org/10.1007/BF00323947

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