Nanometer-sized Regions of Charge Ordering and Charge Melting in La2/3Ca1/3MnO3 Revealed by Electron Micro-diffraction

Abstract

Electron microdiffraction study of phase transition in La2/3Ca1/3MnO3 revealed temperature dependent (h+1/2,0,l) diffraction spots. Their intensity peaks at Tc. Quantitative electron diffraction intensity analysis shows that they come from nanometer-sized domains with modulated transverse atomic displacements in the orthorhombic a-c plane, which has two types of Mn ions and thus charge ordering. The average domain is ~3.6 nm in diameter and ~1.5 nm in height (along the b-axis). The number of domains increases and then decreases, as the sample is cooled through Tc.

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References in corpus (4)

• Short-range polaron correlations in the ferromagnetic La(1-x)Ca(x)MnO(3)
• Charge melting and polaron collapse in $L{a}_{1.2}S{r}_{1.8}M{n}_2{O}_7$
• Evidence for charge localization in the ferromagnetic phase of La_(1-x)Ca_(x)MnO_3 from High real-space-resolution x-ray diffraction
• Breakdown of the lattice polaron picture in La0.7Ca0.3MnO3 single crystals

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