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/

Zendy Plus

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

Zendy Tools

Zendy Open

(Pb0.5Cu0.5)(Sr0.5La0.5)2CuOz (abbreviated as (Pb,Cu)-"1-2-0-1") withsuperconducting transition temperature (Tc) of 25 K is a member (n = 1) of oneof the homologous series of cuprate superconductors,(Pb4+,Cu2+)(Sr2+,Ln3+)2(Y3+,Ca2+)n-1Cu2+nO2-2n+3 (n = 1-4; Ln: lanthanoidelements). For the (Pb,Cu)-"1-2-0-1", substitution effects of 3d transitionmetal elements M (M = Fe, Co, and Zn) for the Cu site in the (Pb,Cu)-Ocharge-reservoir layer (labelled as Cu(1)) are systematically investigated.Because Fe, Co and Ni ions exist as divalent or trivalent in ionic crystals,the Sr2+/La3+ ratio in the (Sr,Ln) site is adjusted to satisfy chargeneutrality, assuming that they are in a trivalent state. This results in thesuccessful synthesis of new materials with nominal compositions of(Pb0.5M0.5)(Sr0.75La0.25)2CuOz (M = Fe and Co). This observation suggests thatFe and Co are trivalent in "1-2-0-1". For M = Zn, the nominal composition of(Pb0.5Zn0.5)(Sr0.5La0.5)2CuOz was found to yield a nearly single "1-2-0-1"phase. Temperature dependence of electrical resistivity and magnetization weremeasured, and superconductivity was confirmed only for the case of M = Zn witha Tc of 19.7 K. For these three materials, the distribution of Fe, Co and Znbetween Cu(1) and another Cu site in the Cu-O2 plane labelled as Cu(2) wasinvestigated employing transmission electron microscopy, which showed that Fe,Co, and Zn occupy both the Cu(1) and Cu(2) sites.

Synthesis and physical properties of (Pb0.5M0.5)(Sr,La)2CuOz (z~5; M = Fe, Co, Cu, and Zn)