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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We study the entropy jump associated with the first-order vortex meltingtransition (FOT) in Bi2Sr2CaCu2O8+{\delta} crystals by means of Hall probemagnetometry. The samples present a diluted distribution of columnar defects(CD) introduced by irradiation with Xe ions. The FOT is detected in actransmittivity measurements as a paramagnetic peak, the height of which isproportional to the enthalpy difference entailed by the transition. By applyingthe Clausius-Clapeyron relation, we quantify the evolution of the entropy jump{\Delta}s as a function of the FOT temperature, TFOT, in both pristine crystalsand crystals with CD. On increasing the density of CD, {\Delta}s decreasesmonotonically with respect to values found in pristine samples. The {\Delta}sversus TFOT dependence in the case of pristine samples follows reasonably wellthe theoretical prediction of dominant electromagnetic coupling for a modelneglecting the effect of disorder. The data for samples with a diluteddistribution of CD are not properly described by such a theoretical model.

Entropy jump at the first-order vortex phase transition in Bi2Sr2CaCu2O8+{\delta} with columnar defects