Phase diagram of La_{5/8-y}Nd_{y}Ca_{3/8}MnO_3 manganites

TL;DR

This study investigates how substituting La with Nd in La_{5/8-y}Nd_{y}Ca_{3/8}MnO_3 manganites affects their magnetic and electrical properties, revealing phase separation and dynamical behaviors across the composition range.

Contribution

It provides a comprehensive phase diagram showing the impact of Nd doping on magnetic phases and phase separation in La-based manganites.

Findings

Doping destabilizes ferromagnetism in La manganites.

Intermediate doping induces phase separation.

Evidence of dynamical behavior within phase-separated states.

Abstract

We report a detailed study of the electric transport and magnetic properties of the LaNdCaMnO manganite system. Substitution of LaIII by smaller NdIII ions, reduces the mean ionic radius of the A site ion. We have studied samples in the entire range between rich La and rich Nd compounds. Results of DC magnetization and resistivity show that doping destabilize the FM character of the pure La compound and triggers the formation of a phase separated state at intermediate doping. We have also found evidence of a dynamical behaviour within the phase separated state. A phase diagram is constructed, summarizing the effect of chemical substitution on the system.