10 research outputs found
Effect of pressure on the magnetic, transport, and thermal-transport properties of the electron-doped manganite CaMnSbO
We have demonstrated the effect of hydrostatic pressure on magnetic and
transport properties, and thermal transport properties in electron-doped
manganites CaMnSbO. The substitution of Sb ion for
Mn site of the parent matrix causes one-electron doping with the
chemical formula CaMnMnSbO
accompanied by a monotonous increase in unit cell volume as a function of .
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 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.Comment: 12 pages,11 figures, 3 table
Effect of pressure on the magnetic, transport, and thermal-transport properties of the electron-doped manganite CaMnSbO
We have demonstrated the effect of hydrostatic pressure on magnetic and
transport properties, and thermal transport properties in electron-doped
manganites CaMnSbO. The substitution of Sb ion for
Mn site of the parent matrix causes one-electron doping with the
chemical formula CaMnMnSbO
accompanied by a monotonous increase in unit cell volume as a function of .
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 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.Comment: 12 pages,11 figures, 3 table
Suppression of the low-temperature phase-separated state under pressure in (EuGd)SrMnO ()
We have demonstrated the effect of pressure on the steplike metamagnetic
transition and its associated magnetostriction in
(EuGd)SrMnO ( and 0.1). The critical
field initiating the field induced ferromagnetic transition in both samples is
lowered by the applied pressure. The further application of external pressure
up to 1.2 GPa on the parent sample causes a spontaneous ferromagnetic
transition with a second-oder like character, leading to collapses of the
steplike transition and its concomitant lattice striction. These findings
indicate a crucial role of the low-temperature phase separated state
characterized by a suppressed magnetization upon decreasing temperature.Comment: 8 pages, 6 figures. arXiv admin note: text overlap with
arXiv:1006.145