PMN: a minimal induced-moment soft pseudo-spin glass perspective

Abstract

An argument that relaxor ferroelectricity in the isovalent alloy ${\mathrm{Ba}(\mathrm{Zr}}_{1-x}{\mathrm{Ti}}_x){\mathrm{O}}_3$ 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 ${\mathrm{Pb}(\mathrm{Mg}}_{1/3}{\mathrm{Nb}}_{2/3}{)\mathrm{O}}_3$ (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.

References in corpus (1)

• Study of the de Almeida-Thouless line using power-law diluted one-dimensional Ising spin glasses

Cited by in corpus (4)

• Insight into dielectric response of ferroelectric relaxors by statistical modeling
• A spin glass perspective on ferroic glasses
• Random Electric Field Instabilities of Relaxor Ferroelectrics
• Materials Physics and Spin Glasses