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 3$d$-5$d$ based double perovskites offer an ideal playground to study theinterplay between electron correlation ($U$) and spin-orbit coupling (SOC)effect, showing exotic physics. The Sr$_2$FeIrO$_6$ is an interesting member inthis family with ionic distribution of Fe$^{3+}$ (3$d^5$) and Ir$^{5+}$(5$d^4$) where the later is believed to be nonmagnetic under the picture ofstrong SOC. Here, we report detailed investigation of structural, magnetic andelectronic transport properties along with electronic structure calculations in(Sr$_{1-x}$Ca$_x$)$_2$FeIrO$_6$ series with $x$ from 0 to 1. While the basicinteractions such as, $U$ and SOC are unlikely to be modified but a structuralmodification is expected due to ionic size difference between Sr$^{2+}$ andCa$^{2+}$ which would influence other properties such as crystal field effectand band widths. While a nonmonotonic changes in lattice parameters areobserved across the series, the spectroscopic investigations reveal that 3+/5+charge state of Fe/Ir continue till end of the series. An analysis of magneticdata suggests similar nonmonotonic evolution of magnetic parameters withdoping. Temperature dependent crystal structure as well as low temperature (5K) magnetic structure have been determined from neutron powder diffractionmeasurements. The whole series shows insulating behavior. The electronicstructure calculations show, SOC enhanced, a noncollinear antiferromagnetic andMott-type insulating state is the stable ground state for present series with asubstantial amount of orbital moment, but less than the spin magnetic moment,at the Ir site and the magnetocrystalline anisotropy. The obtained resultsimply that the Ca$^{2+}$ has large influence on the magnetic and transportproperties, further showing a large agreement between experimental results aswell as theoretical calculations.

Structure, magnetism and electronic properties in 3$d$-5$d$ based double  perovskite (Sr$_{1-x}$Ca$_x$)$_2$FeIrO$_6$ (0 $\leq$ $x$ $\leq$ 1): A  combined experimental and theoretical investigation