Electric field controlled magnetization and transport properties of La0.7Ca0.3MnO3 ultrathin film

TL;DR

This study demonstrates electric field control over magnetization and transport in ultrathin La0.7Ca0.3MnO3 films, revealing significant electroresistance and magnetic phase changes useful for spintronic applications.

Contribution

It presents a novel approach to modulate magnetization and resistance in LCMO ultrathin films using electric fields in a field effect device.

Findings

Electroresistance of ~78% at -8 V gate voltage

Increase in ferromagnetic phase with applied gate voltage

Effective electric control of magnetic and transport properties

Abstract

We have investigated the effect of electric field control on the magnetization and the transport properties in La0.7Ca0.3MnO3 (LCMO) ultrathin film (~10 nm) by using it as the semiconductor channel material of a prototypical field effect device and SiO2 as dielectric gate. A large electroresistance (ER) of ~78% at Vg = -8 V is found in LCMO at 200 K. The direct magnetization measurements confirm the formation of a large ferromagnetic phase with the increase in the applied gate voltage at 200 K.