Double metal-insulator transitions and magnetoresistance:An intrinsic feature of Ru substituted La(0.67)Ca(0.33)MnO(3)

TL;DR

This study demonstrates that Ru substitution in La(0.67)Ca(0.33)MnO(3) intrinsically causes double metal-insulator transitions and magnetoresistance due to magnetic phase separation, independent of extrinsic factors.

Contribution

It provides evidence that the double transitions and magnetoresistance are intrinsic features of Ru-doped La(0.67)Ca(0.33)MnO(3), highlighting magnetic phase separation as the underlying mechanism.

Findings

Double metal-insulator transitions observed.

Magnetoresistance is intrinsic to Ru substitution.

Magnetic phase separation involves co-existing ferromagnetic phases.

Abstract

In this paper, we examine the possible influence of extrinsic factors on the electrical and magnetotransport of La(0.67)Ca(0.33)Mn(1-x)Ru(x)O(3) (x < 0.10). These results not only exclude the extrinsic factors, but establishes the fact that the metal transitions both exhibiting MR is intrinsic to Ru substituted La(0.67)Ca(0.33)MnO(3) and the system. These results substantiate our hypothesis that Ru substituted system undergoes a magnetic phase separation involving the co-existence of two ferromagnetic-metallic phases in its ground state.