Magnetic and Electric properties of La_{1-delta}MnO_{3}

Abstract

The magnetic phase diagram of $L{a}_{1-\delta }Mn{O}_3$ powdered samples have been studied as a function of $\delta$ in the low doping range. $L{a}_{0.97}Mn{O}_3$ has a canted magnetic structure at low temperature $(θ\simeq 130\QTR{group}{{}^{\circ}})$. Above $T_C=118K$, it becomes a paramagnet with a huge effective magnetic moment, ${\mu }_{eff}=6.0{\mu }_B$, reflecting the presence of magnetoelastic polarons which are not affected by the magnetic field (up to 20T) nor the temperature $(1.2T_C<T<2.5T_C)$. When $\delta$ is increased to $\delta =0.07$, polarons are still presen at high temperature, with a smaller size: ${\mu }_{eff}=5.8{\mu }_B$. The system becomes fully ferromagnetic below 170K but remains insulating down to the lowest temperature.

8pages; 6 figures as EPS files added

References in corpus (5)

• Double Exchange Alone Does Not Explain the Resistivity of $L{a}_{1-x}S{r}_{x}Mn{O}_3$
• Dynamic Jahn-Teller Effect and Colossal Magnetoresistance in $L{a}_{1-x}{A}_{x}Mn{O}_3$
• Electronic and Magnetic States in the Giant Magneto-resistive Compounds
• Liquid-like spatial distribution of magnetic polarons revealed by neutron scattering in La{1-x}Ca{x}MnO3
• Effect of disorder on the magnetic and transport properties of La_{1-x}Sr_{x}MnO_{3}

Cited by in corpus (8)

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• Spin dynamics in La_{1-x}Sr_{x}MnO_{3} (x \le 0.175) investigated by high-field ESR spectroscopy
• The effect of oxygen stoichiometry on electrical transport and magnetic properties of La0.9Te0.1MnOy
• Electric field driven destabilization of the insulating state in nominally pure LaMnO3
• Inhomogeneous phase separation and domain wall dynamics in the orthorhombically distorted La_{0.87}MnO_x
• Influence of the Magnetic Sub-Lattices in the Double Perovskite Compound LaCaNiReO${}_6$
• Li${}_2$Sr[MnN]${}_2$: a magnetically ordered, metallic nitride