Hopfions emerge in ferroelectrics

Hydrogen in Ferroelectrics

Abelian and non-Abelian Hopfions in all odd dimensions

We extend the definition of the topological charge pertaining to the CP (i.e. O(3)) Skyrme-Fadde’ev Hopfion on IR, to candidates for topological charges of CP sigma models on IR, for all n. For this, the Abelian composite connections of the CP sigma models are employed. In higher dimensions (n ≥ 1) it turns out that such charges, described by the nonAbelian composite connections of suitable Gra...

Super-crystals in composite ferroelectrics

As atoms and molecules condense to form solids, a crystalline state can emerge with its highly ordered geometry and subnanometric lattice constant. In some physical systems, such as ferroelectric perovskites, a perfect crystalline structure forms even when the condensing substances are non-stoichiometric. The resulting solids have compositional disorder and complex macroscopic properties, such ...

Phase Transitions in Relaxor Ferroelectrics

This paper covers the properties of relaxor ferroelectrics and considers the transition from the paraelectric state to the relaxor state comparing experimental data with the spherical random-bond randomfield model (SRBRF). It found that this model predicts and is experimental verifies a glassy state at the transition temperature for E < Ec and a ferroelectric state with quench random fields for...

Ferroelectrics for Biomedical Applications

Currently, researchers are mainly focusing the phase transitions, domain structures, domain wall functionalities, magneto electric coupling, and the potential applications in high-density ferroelectric non-volatile memories of ferroelectric materials [1-5]. However, there are relatively less research interests in the biomedical applications of ferroelectric materials which is very important to ...