Understanding the multiple magnetic structures of the intermetallic compound NdMn1.4Co0.6Si2

TL;DR

This study investigates the complex magnetic phase transitions of NdMn1.4Co0.6Si2 across a broad temperature range using multiple techniques, revealing five distinct magnetic structures and transitions.

Contribution

It provides a detailed characterization of the multiple magnetic phases and transitions in NdMn1.4Co0.6Si2, highlighting the temperature-dependent evolution of its magnetic structures.

Findings

Identified five distinct magnetic phases with temperature.

Mapped the temperature-dependent magnetic structures.

Revealed coexistence of ferromagnetic and antiferromagnetic phases.

Abstract

Magnetic phases for the intermetallic compound NdMn1.4Co0.6Si2 have been investigated at various temperatures by dc magnetization, neutron diffraction and neutron depolarization. Our study shows multiple magnetic phase transitions with temperature (T) over 1.5-300 K. In agreement with dc-magnetization and neutron depolarization results, the temperature dependence of the neutron diffraction patterns shows five distinct regions with different magnetic phases. These temperature regions are (i) T >= 215 K, (ii) 215 K > T >= 50 K, (iii) 50 K > T >= 40 K, (iv) 40 K > T > 15 K, and (v) T =< 15 K. The corresponding magnetic structures are paramagnetic, commensurate collinear antiferromagnetic (AFM-I), incommensurate AFM (AFM-II), mixed ferromagnetic and AFM (FM+AFM-II), and incommensurate AFM (AFM-II), respectively.