Year: 2004
Type: article
Abstract: We have systematically investigated the structural, magnetic, and transport properties of the ${\mathrm{Sr}}_{1\ensuremath{-}x}{\mathrm{Ce}}_{x}{\mathrm{MnO}}_{3}$ $(0\ensuremath{\leqslant}x\ensuremath{\leqslant}0.35)$ system as a function of temperature and magnetic field. For $x\ensuremath{\geqslant}0.10$, the system does not show any long-range magnetic ordering but spin-glass-like behavior at low temperatures below ${T}_{\mathrm{SG}}$. The in-phase susceptibility $\ensuremath{\chi}$ below ${T}_{\mathrm{SG}}$ decreases and ${T}_{\mathrm{SG}}$ shifts toward higher temperature with the frequency of an ac magnetic field. In the paramagnetic state, $\ensuremath{\chi}$ exhibits an unusual $T$ dependence due to the formation of a microscopic inhomogeneous magnetic phase. For the $x=0.25$ sample, both $\ensuremath{\rho}$ and $\ensuremath{\chi}$ show an anomaly at around $110\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ due to a charge-ordering transition. Both the $x=0.25$ and $0.35$ samples show large negative magnetoresistance over a wide range of $T$.
Source: Physical Review B
Authors: P. Mandal, A. Hassen, A. Loidl
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2017566708