Inhomogeneous phase separation and domain wall dynamics in the orthorhombically distorted La_{0.87}MnO_x

TL;DR

This study investigates the complex magnetization and resistivity behaviors in La_{0.87}MnO_x, revealing inhomogeneous phase separation and domain wall dynamics that influence its magnetic and electronic properties.

Contribution

It presents new insights into the interplay of phase separation and domain wall dynamics in orthorhombically distorted manganites, highlighting their effects on magnetotransport.

Findings

Irreversibility in resistivity and magnetization above T_c and T_{MI}

Memory effects linked to domain wall dynamics

Evidence of inhomogeneous phase separation affecting properties

Abstract

We observe the interesting magnetization and resistivity results in the orthorhombically distorted self doped manganite, La_{0.87}MnO_x. A significant irreversibility between zero-field-cooled and field-cooled resistivities as well as magnetization data is clearly observed up to a temperature which is well above the both paramagnetic to ferromagnetic (T_c) and metal to insulator transition (T_{MI}) temperatures. In the ferromagnetically ordered and metallic states the magnetotransport results suggest the influence of domain wall dynamics. Interesting scenario of memory effects through the domain wall dynamics is strikingly observed in the relaxation of resistivity in a limited temperature region. The characteristic features of magnetotransport behaviour are suggested duo to the co-existence of structurally driven inhomogeneous phase separation and domain wall dynamics.