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    • 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

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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