Effect of pressure on the magnetic, transport, and thermal-transport properties of the electron-doped manganite CaMn$_{1-x}$Sb$_{x}$O$_{3}$

TL;DR

This study investigates how hydrostatic pressure influences the magnetic, electrical, and thermal transport properties of electron-doped CaMn$_{1-x}$Sb$_{x}$O$_{3}$ manganites, revealing complex magnetic behaviors and doping effects.

Contribution

It provides new insights into the combined effects of chemical doping and hydrostatic pressure on the properties of electron-doped manganites.

Findings

Sb doping suppresses electrical resistivity and Seebeck coefficient at high temperatures.

Anomalous diamagnetic behaviors observed at specific doping levels.

Hydrostatic pressure effects on magnetization differ from chemical pressure effects.

Abstract

We have demonstrated the effect of hydrostatic pressure on magnetic and transport properties, and thermal transport properties in electron-doped manganites CaMn$_{1-x}$Sb$_{x}$O$_{3}$. The substitution of Sb$^{5+}$ ion for Mn $^{4+}$site of the parent matrix causes one-electron doping with the chemical formula CaMn$^{4+}_{1-2x}$Mn$^{3+}_{x}$Sb$^{5+}_{x}$O$_{3}$ accompanied by a monotonous increase in unit cell volume as a function of $x$. Upon increasing the doping level of Sb, the magnitudes of both electrical resistivity and negative Seebeck coefficient are suppressed at high temperatures, indicating the electron doping. Anomalous diamagnetic behaviors at $x=0.05$ and 0.08 are clearly observed in field cooled dc magnetization. The effect of hydrostatic pressure on dc magnetization is in contrast to the chemical pressure effect due to Sb doping. The dynamical effect of ac magnetic susceptibility measurement points to the formation of the magnetically frustrated clusters such as FM clusters embedded in canted AFM matrix.