• The synthesis, crystal growth, and characterization of nonstoichiometric magnetite

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/096/06/0391-0409

    • Keywords

       

      Magnetite; metal-insulator transitions; heat capacity measurements; electrical properties

    • Abstract

       

      A review is provided concerning the thermodynamic and electrical characteristics of nonstoichiometric magnetite, Fe3(1-δ)O4. Great stress is placed on the need for careful preparation and appropriate annealing of single crystal specimens. Information needed to prepare material of a given δ value is provided. For δ≤0·0039 magnetite undergoes a first-order phase change at the Verwey transition; for δ>0·0039 the change is of second or higher order. Corresponding types of changes are encountered in resistivity and Seebeck coefficient measurements. Some aspects of the Verwey transition are discussed.

    • Author Affiliations

       

      J M Honig1

      1. Department of Chemistry, Purdue University, West Lafayette, Indiana - 47907, USA
    • Dates

       
  • Journal of Chemical Sciences | News

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