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    • Keywords


      Microparticle; microemulsion; ferroelectricity; ferrimagnetism; magnon scattering; lead zirconate titanate; yttrium iron garnet; gamma-Fe2O3; Mössbauer spectroscopy

    • Abstract


      Microparticles and micrograin ceramics show features distinct from the usual-sized polycrystalline materials. Amorphous state material combined with microparticle size for Pb(Zr0.51 Ti0.49)O3 mimics the dielectric behaviour of crystalline ferroelectricity in ABO3 compounds. Fine-grained Y3Fe5O12 (yig) synthesized by pressure sintering ofyig microparticles exhibit spinwave relaxation due to transit time across grain diameter. Applying microemulsion techniques for microparticle synthesis,γ-Fe2O3 has been synthesized. The phase stability fractionγ-Fe2O3/α-Fe2O3 is found to be a function of particle size. At very small sizesγ-Fe2O3 becomes amorphous, leading to interesting Mössbauer studies.

    • Author Affiliations


      M S Multani1 P Ayyub1 V R Palkar1 M R Srinivasan1 V Saraswati1 R Vijayaraghavan1 DO Shah1 2

      1. Materials Research Group, Tata Institute of Fundamental Research, Bombay - 400 005, India
      2. Department of Chemistry, University of Florida, Gainesville, Florida - 32611, USA
    • Dates

  • Bulletin of Materials Science | News

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