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

Phase diagram of Na$_x$CoO$_2$ (x $\gtrsim$ 0.71) has been reinvestigatedusing electrochemically fine tuned single crystals. Both phase separation andstaging phenomena as a result of sodium multi-vacancy cluster ordering havebeen found. Phase separation phenomenon is observed in the narrow ranges of0.76 $\lesssim$ x $\lesssim$ 0.82 and 0.83 $\lesssim$ x $\lesssim$ 0.86. Whilex = 0.820 shows A-type antiferromagnetic (A-AF) ordering below 22K, x = 0.833is confirmed to have a magnetic ground state of A-AF ordering below $\sim$8Kand is only reachable through slow cooling. In addition, x = 0.859 is found tobe responsible for the highest A-AF transition temperature at about 29K.Staging model based on ordered stacking of multi-vacancy layers is proposed toexplain the hysteretic behavior and A-AF correlation length for x $\sim$0.82-0.86.

Staging model of the ordered stacking of vacancy layers and phase separation in the layered NaCoO(x > 0.71) single crystals