Effect of pressure on the magnetic, transport, and thermal-transport properties of the electron-doped manganite CaMn${}_{1-x}$Sb${}_x$O${}_3$

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${}_{1-2x}^{4+}$Mn${}_x^{3+}$Sb${}_x^{5+}$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.

12 pages,11 figures, 3 tables

References in corpus (5)

• Complex interplay of 3d and 4f magnetism in La:GdMnO3
• Phase Separation and the Low-Field Bulk Magnetic Properties of Pr0.7Ca0.3MnO3
• Inhomogeneous magnetism in La-doped CaMnO3. (I) Nanometric-scale spin clusters and long-range spin canting
• Heat Conduction and Magnetic Phase Behavior in Electron-Doped Ca_{1-x} La_x MnO_3(0 <= x <= 0.2)
• Anisotropic phonon conduction and lattice distortions in CMR-type bilayer manganite (La${}_{1-z}$Pr${}_z$)${}_{1.2}$Sr${}_{1.8}$Mn${}_2$O${}_7$ (z=0,0.2,0.4 and 0.6) single crystals

Cited by in corpus (2)

• Phase separated behavior in Yttrium doped CaMnO3
• Glassy dielectric anomaly and negative magneto-capacitance effect in electron-doped Ca${}_{1-x}$Sr${}_x$Mn${}_{0.85}$Sb${}_{0.15}$O${}_3$