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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/001/02/0061-0065

    • Keywords

       

      Ferromagnetism; superparamagnetism; basaltic rocks

    • Abstract

       

      Studies on two rare cases of magnetic behaviour in basaltic rocks are reported. In both the cases a peak in susceptibility occurs at −160°C. However, one sample shows only normal hysteresis loops at low temperatures in a wide range of fields, while the other sample shows a constricted hysteresis loop in 1000 Oe at −190°C. Both types of behaviour can occur as a result of differing states of aggregation of interacting superparamagnetic particles in the respective samples.

    • Author Affiliations

       

      C Radhakrishnamurty1 N P Sastry1 E R Deutsch2

      1. Tata Institute of Fundamental Research, Bombay - 400005
      2. Physics Department, Memorial University of Newfoundland, St. John’s, Canada

    • Dates

       
      Published
      August 1973
      Manuscript received
      7 January 1973

  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

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