Phase-coexistence and glass-like behavior in magnetic and dielectric solids with long-range order

Authors

  • S. B. Roy,

    Corresponding author
    1. Magnetic and Superconducting Materials Section, Materials & Advanced Accelerator Sciences Division, Raja Ramanna Centre for Advanced Technology, Indore, India
    • Corresponding author: e-mail sbroy@rrcat.gov.in, Phone: 91 731 2488336, Fax: 91 731 2488300

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  • P. Chaddah

    1. Magnetic and Superconducting Materials Section, Materials & Advanced Accelerator Sciences Division, Raja Ramanna Centre for Advanced Technology, Indore, India
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Abstract

Phase-coexistence in the manganese-oxide compounds or manganites with colossal magneto-resistance (CMR) has been generally considered to be an inhomogeneous ground state. An alternative explanation of phase-coexistence as the manifestation of a disorder-broadened first-order magnetic phase transition being interrupted by the glass-like arrest of kinetics is now gradually gaining ground. This kinetic arrest of a first-order phase transitions, between two states with long-range magnetic order, has actually been observed in various other classes of magnetic materials in addition to the CMR manganites. The underlying common features of this kinetic arrest of a first-order phase transition are discussed in terms of the phenomenology of glasses. The possible manifestations of such glass-like arrested states across disorder-influenced first-order phase transitions in dielectric solids and in multiferroic materials, are also discussed.

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