Amorphous state ferroelectricity, magnon scattering and phase stability in microparticle materials
作者： M S Multani , P Ayyub , V R Palkar , M R Srinivasan , V Saraswati
DOI: 10.1007/BF02743906
关键词: Magnon 、 Dielectric 、 Condensed matter physics 、 Mineralogy 、 Particle size 、 Ceramic 、 Amorphous solid 、 Materials science 、 Ferroelectricity 、 Crystallite 、 Microparticle
摘要: 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 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 synthesis,γ-Fe2O3 has been synthesized. The phase stability fractionγ-Fe2O3/α-Fe2O3 is found be a function particle size. At very small sizesγ-Fe2O3 becomes amorphous, leading interesting Mossbauer studies.
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