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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Polycrystalline samples of Sr2Mn2CuAs2O2, Sr2Mn3As2O2, and Sr2Zn2MnAs2O2 weresynthesized. Their temperature- and applied magnetic field-dependentstructural, transport, thermal, and magnetic properties were characterized bymeans of x-ray and neutron diffraction, electrical resistivity rho, heatcapacity, magnetization and magnetic susceptibility measurements. Thesecompounds have a body-centered-tetragonal crystal structure (space groupI4/mmm) that consists of MO2 (M = Zn and/or Mn) oxide layers similar to theCuO2 layers in high superconducting transition temperature Tc cupratesuperconductors, and intermetallic MAs (M = Cu and/or Mn) layers similar to theFeAs layers in high-Tc pnictides. These two types of layers alternate along thecrystallographic c-axis and are separated by Sr atoms. The site occupancies ofMn, Cu and Zn were studied using Rietveld refinements of x-ray and neutronpowder diffraction data. The temperature dependences of rho suggest metalliccharacter for Sr2Mn2CuAs2O2 and semiconducting character for Sr2Mn3As2O2 andSr2Zn2MnAs2O2. Sr2Mn2CuAs2O2 is inferred to be a ferrimagnet with a Curietemperature TC = 95(1) K. Remarkably, we find that the magnetic ground statestructure changes from a G-type antiferromagnetic structure in Sr2Mn3As2O2 toan A-type ferrimagnetic structure in Sr2Mn2CuAs2O2 in which the Mn ions in eachlayer are ferromagnetically aligned, but are antiferromagnetically alignedbetween layers.

physical review. b, condensed matter and materials physics

Synthesis, Structure and Properties of Tetragonal Sr2M3As2O2 (M3 = Mn3,  Mn2Cu and MnZn2) Compounds Containing Alternating CuO2-Type and FeAs-Type  Layers