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    • Keywords


      Ferrofluids; optical gaussmeter; ferrites; magneto-optics; laser transmission.

    • Abstract


      Ferrofluids belonging to the series, Ni𝑥Fe1−𝑥Fe2O4 and Zn𝑥Fe1−𝑥Fe2O4, were synthesized using cold co-precipitation. Liquid films of these ferrofluids were prepared by encapsulating the ferrofluids in between two optically smooth and ultrasonically cleaned glass plates. Magnetic field induced laser transmission through these ferrofluid films has been investigated. Magnetic field values can be calibrated in terms of output laser power in the low field region in which the variation is linear. This set up can be used as a cheap optical gaussmeter in the low field regime. Using the same set-up, the saturation magnetization of the sample used can also be calculated with a sample that is pre-characterized. Hence both magnetization of the sample, as well as applied magnetic field can be sensed and calculated with a precalibrated sample.

    • Author Affiliations


      Swapna S Nair1 S Rajesh2 V S Abraham3 M R Anantharaman1

      1. Department of Physics, Cochin University of Science and Technology, Cochin 682 022, India
      2. Biophysics and Microscopy Group, Molecular Cytology, University of Amsterdam, 1090 GB Amsterdam, The Netherlands
      3. School of Engineering and Sciences, International University of Bremen, 28759, Bremen, Germany
    • Dates

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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