Selective dilution and magnetic properties of La_{0.7}Sr_{0.3}Mn_{1-x}M'_xO_3 (M' = Al, Ti)

Abstract

The magnetic lattice of mixed-valence Mn ions in La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$ is selectively diluted by partial substitution of Mn by Al or Ti. The ferromagnetic transition temperature and the saturation moment decreases with substitution in both series. The volume fraction of the non-ferromagnetic phases evolves non-linearly with the substitution concentration and faster than theoretically expected. By presenting the data in terms of selective dilutions, the reduction of $T_{\mathrm{c}}$ is found to be scaled by the relative ionic concentrations and is consistent with a prediction derived from molecular-field theory.

6 pages, 5 figures, REVTex4.0. Submitted to PRB

References in corpus (5)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Double Exchange Alone Does Not Explain the Resistivity of $L{a}_{1-x}S{r}_{x}Mn{O}_3$
• Dynamic Jahn-Teller Effect and Colossal Magnetoresistance in $L{a}_{1-x}{A}_{x}Mn{O}_3$
• Structure, magnetic and transport properties of Ti-substituted La0.7Sr0.3MnO3
• Effect of Al substitution on the charge ordered Pr{_0.5}Ca{_0.5}MnO{_3}: Structure, Magnetism and Transport

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• Effect of Hetrovalent substitution at Mn site on the Magnetic and Transport Properties of La${}_{0.67}$Sr${}_{0.33}$MnO${}_3$
• Collapse of ferromagnetism with Ti doping in Sm${}_{0.55}$Sr${}_{0.45}$MnO${}_3$: A combined experimental and theoretical study