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PMN: a minimal induced-moment soft pseudo-spin glass perspective | | David Sherrington
; | | Date: |
14 Oct 2013 | | Abstract: | An argument that relaxor ferroelectricity in the isovalent alloy $mathrm
{Ba(Zr}_{1-x}mathrm{Ti}_{x})mathrm{O}_3$ can be understood as an induced
moment soft pseudo-spin glass on the B-ions of the $mathrm{ABO}_{3}$ matrix is
extended to the experimentally paradigmic but theoretically more complex
heterovalent relaxor $mathrm {Pb(Mg}_{1/3}mathrm{Nb}_{2/3}mathrm{)O}_3$
(PMN). It is argued that interesting behaviour of the onset of non-ergodicity,
frequency-dependent susceptibility peaks and precursor nanodomains can be
understood from analagous considerations of the B-ions, with the displacements
of the Pb ions a largely independent, but distracting, side-feature. This
contrasts with conventional conceptualizations. | | Source: | arXiv, 1310.3748 | | Services: | Forum | Review | PDF | Favorites | |
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