Metamagnetic and electronic transitions in charge-ordered Nd0.50Ca0.47Ba0.03MnO3 manganite

TL;DR

This study investigates how Ba doping influences the magnetic and electronic transitions in Nd0.50Ca0.47Ba0.03MnO3, revealing significant reductions in the critical magnetic field and complex temperature-dependent behaviors.

Contribution

It demonstrates the effects of Ba doping on metamagnetic and electronic transitions in charge-ordered manganite, highlighting the role of A-site cation disorder and size.

Findings

Sharp metamagnetic transition at 2.5 K under magnetic field

Critical magnetic field reduces from 15 T to 3 T with Ba doping

Hc exhibits a minimum as temperature increases

Abstract

The ABO3 type charge-ordered antiferromagnetic Nd0.50Ca0.50MnO3 (NCMO) manganite is doped at A-site by 3 % of Ba2+ for Ca2+. The resulting system, Nd0.50Ca0.47Ba0.03MnO3 (NCBMO), is studied for the effects of Ba doping on the magnetic and electronic properties. On application of magnetic field to NCBMO, strongly correlated successive sharp metamagnetic and electronic transitions are observed from antiferromagnetic-insulating to ferromagnetic-metallic state at 2.5 K. The critical magnetic field (Hc) required for metamagnetism is found to reduce drastically from 15 T for undoped NCMO to 3 T for NCBMO. On increasing the temperature, the Hc of NCBMO passes through a minimum. This behavior of Hc of NCBMO contrasts to that of NCMO. The results are discussed in context of A-site cation disorder and size.