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Nucleation in the presence of long-range interactionsUnlike droplet nucleation near a liquid-gas critical point, the decay of metastable phases in crystalline materials is strongly affected by the presence of long-range forces. Field quench experiments performed on the ferroelectric barium titanate indicate that nucleation in this material is markedly different from that observed in liquids. In this paper, a theory for nucleation at a first-order phase transition in which the mediating forces are long range is presented. It is found that the long-range force induces cooperative nucleation and growth processes, and that this feedback mechanism produces a well-defined delay time with a sharp onset in the transformation to the stable phase. Closed-form expressions for the characteristic onset time and width of the transition are developed, in good agreement with numerical and experimental results.
Document ID
19890049392
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chandra, P.
(California, University Santa Barbara, United States)
Date Acquired
August 14, 2013
Publication Date
April 1, 1989
Publication Information
Publication: Physical Review A - General Physics, 3rd Series
Volume: 39
ISSN: 0556-2791
Subject Category
Thermodynamics And Statistical Physics
Accession Number
89A36763
Funding Number(s)
CONTRACT_GRANT: DE-FG03-84ER-45108
CONTRACT_GRANT: NSF PHY-82-17853
Distribution Limits
Public
Copyright
Other

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