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

Magnetic and transport properties of La0.7Ca0.3Mn1-xM'xO3 (M'=Al,Ti) arestudied. The dilution of the Mn lattice results in a weakening of theferromagnetism, a deterioration of the metallic conductivity, and a strongenhancement of the magnetoresistance. Although Tc linearly decreases with x inthe low substitution ranges for both M' series, the scaling behavior Tc(np)previously observed for La0.7Sr0.3Mn1-xM'xO3 [Phys. Rev. B 73, 184403 (2006)]is no longer obtained. Extrapolations of the Tc(np) linear curves to Tc=0 givenp values much smaller than 1. These results suggest that, according to amolecular-field approximation, antiferromagnetic superexchange between Mn ionsis significant in La0.7Ca0.3MnO3, in contrast to what observed inLa0.7Sr0.3MnO3. Additionally, structural data of the Al-substituted samplessuggest that variations of the eg-electron bandwidth W cannot explain thedecrease of Tc in magnetically diluted manganites.

Effects of dilution on magnetic and transport properties of La0.7Ca0.3Mn1-xM'xO3