English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Structural defects in a crystal are responsible for the "two length-scale"behavior, in which a sharp central peak is superimposed over a broad peak incritical diffuse X-ray scattering. We have previously measured the scalingbehavior of the central peak by scattering from a near-surface region of a V2Hcrystal, which has a first-order transition in the bulk. As the temperature islowered toward the critical temperature, a crossover in critical behavior isseen, with the temperature range nearest to the critical point beingcharacterized by mean field exponents. Near the transition, a small two-phasecoexistence region is observed. The values of transition and crossovertemperatures decay with depth. An explanation of these experimental results ishere proposed by means of a theory in which edge dislocations in thenear-surface region occur in walls oriented in the two directions normal to thesurface. The strain caused by the dislocation lines causes the ordering in thecrystal to occur as growth of roughly cylindrically shaped regions. After theregions have reached a certain size, the crossover in the critical behavioroccurs, and mean field behavior prevails. At a still lower temperature, therest of the material between the cylindrical regions orders via a weakfirst-order transition.

Depth-dependent ordering, two-length-scale phenomena and crossover behavior in a crystal featuring a skin-layer with defects