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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Rare earth Manganite Nickelite double perovskites are prepared by solgelassisted combustion route, where, R varies from La, Pr, Nd, Sm, Gd, Tb, Dy, Y,and Ho. The samples have been systematically investigated using powder xraydiffraction, Raman spectroscopy, ultraviolet visible spectroscopy,magnetization, and synchrotron based xray absorption spectroscopy measurements.All compounds in the family crystallize in the monoclinic structure and themonoclinic distortion enhances with decreasing trivalent rare earth radii. Themagnetic ordering temperature, Tc, decreases from 270 K for La to 80 K for Hosamples as the rare earth radii decrease from 0.116nm for La to 0.102nm in caseof Ho. An additional anomaly is observed in samples containing Nd, Sm, Tb, andDy at lower temperatures, which originates from the 3d to 4f coupling betweenMn and Ni and Nd, Sm, Tb and Dy magnetic moments. Further, high saturationmagnetization is achieved for all samples indicating that they are atomicallyordered and have less anti site disorders. Upon decreasing the size of rareearth ions, the local structure shows an expansion of NiO6 octahedra and almostunchanged MnO6 octahedra. Xray absorption near edge spectroscopy reveals thatmajority of Ni and Mn ions are in positive 2 and positive 4 valence states inall the samples. Raman spectra of RNMO show a softening of phonon modesresulting in the elongation of Ni to O and Mn to O bond lengths. Finally, acorrelation between lattice parameters, structural distortion, octahedraltilting, superexchange angle, and electronic band gap, Curie temperature, andthe rare earth ionic radius is established.

Rare earth size dependence on structural, electronic and magnetic properties of R2NiMnO6 double perovskites