Colossal enhancement of magnetoresistance in La$_{0.67}$Sr$_{0.33}$MnO$_{3}$ / Pr$_{0.67}$Ca$_{0.33}$MnO$_{3}$ multilayers: reproducing the phase-separation scenario

TL;DR

This paper reports a significant increase in magnetoresistance in multilayers of manganites, demonstrating phase coexistence and metastability effects that mimic naturally phase-separated manganites, with potential for room-temperature applications.

Contribution

It introduces artificially created phase coexistence in multilayers that reproduces metastability signatures seen in naturally phase-separated manganites.

Findings

Magnetoresistance is enhanced over a broad temperature range, including room temperature.

Multilayers exhibit characteristic signatures of metastability in magnetotransport.

Phase coexistence is artificially induced, mimicking natural phase separation.

Abstract

Colossal enhancement of magnetoresistance has been achieved over a broad temperature range which extends upto the room temperature, in ferromagnetic metal-charge ordered insulator manganite multi-layers. The artificially created phase coexistence in the multilayers reproduce the characteristic signatures of metastability in the magnetotransport properties commonly observed in electronically phase-separated manganites.