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

The pressure effects on the JT distortion of three representative compoundsbelonging to the LaMn_1-xGa_xO_3 (x= 0.2, 0.3, 0.4) family was widelyinvestigated by means of X-ray diffraction and Raman spectroscopy. A compoundwith a fully JT distorted structure (x=0.2), one with regular octahedra (x=0.6)and one in an intermediate configuration (x=0.3) were selected. A pressureinduced transitions from the orthorhombic Pbnm phase towards structures withhigher symmetry were observed in all the samples. Both Raman and X-ray dataconfirm that the most important structural effect of pressure is that ofreducing the octahedral distortion. The appearance of a feature in the latticeparameter behavior connected to a structural instability was also detected,pointing out the key role of the JT distortion in stabilizing the manganitestructures. On the other hand, the complete suppression of the JT distortion inthe high-pressure phases cannot be claimed. The Raman spectra collected frommore distorted compounds (x=0.2, 0.3) reveal clearly the coexistence of domainsof distorted and more regular octahedra in a certain pressure range. The firstsketch of the Pressure vs. Ga-content phase diagram was drawn.

High pressure behavior of Ga-doped LaMnO_3: a combined X-ray diffraction and optical spectroscopy study