Magnetic States and Electronic Properties of Manganese-Based Intermetallic Compounds Mn$_2$YAl and Mn$_3$Z (Y = V, Cr, Fe, Co, Ni; Z = Al, Ge, Sn, Si, Pt)

TL;DR

This paper reviews the diverse magnetic and electronic properties of manganese-based intermetallic compounds Mn$_2$YAl and Mn$_3$Z, highlighting their potential in spintronics and nanoelectronics due to their tunable states and effects.

Contribution

It provides a comprehensive overview of experimental and theoretical findings on the magnetic states and electronic properties of Mn$_2$YAl and Mn$_3$Z compounds, emphasizing their diversity and sensitivity to external factors.

Findings

Mn$_2$YZ compounds can exhibit half-metallic ferromagnetism and spin gapless semiconductor states.

Mn$_3$Z compounds show properties of half-metallic ferromagnets and topological semimetals with large Hall effects.

Magnetic and electronic properties are highly sensitive to external influences and processing methods.

Abstract

We present a brief review of experimental and theoretical papers on studies of electron transport and magnetic properties in manganese-based compounds Mn$_2$YZ and Mn$_3$Z (Y = V, Cr, Fe, Co, Ni, etc.; Z = Al, Ge, Sn, Si, Pt, etc.). It has been shown that in the electronic subsystem of Mn$_2$YZ compounds, the states of a half-metallic ferromagnet and a spin gapless semiconductor can arise with the realization of various magnetic states, such as a ferromagnet, a compensated ferrimagnet, and a frustrated antiferromagnet. Binary compounds Mn$_3$Z have the properties of a half-metallic ferromagnet and a topological semimetal with a large anomalous Hall effect, spin Hall effect, spin Nernst effect, and thermal Hall effect. Their magnetic states are also very diverse: from a ferrimagnet and an antiferromagnet to a compensated ferrimagnet and a frustrated antiferromagnet, as well as an antiferromagnet with a kagome-type lattice. It has been demonstrated that the electronic and magnetic properties of such materials are very sensitive to external influences (temperature, magnetic field, external pressure), as well as the processing method (cast, rapidly quenched, nanostructured, etc.). Knowledge of the regularities in the behavior of the electronic and magnetic characteristics of Mn$_2$YAl and Mn$_3$Z compounds can be used for applications in micro- and nanoelectronics and spintronics.