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

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

2000-09-29

arxiv.org/abs/cond-mat/0009472v1

Physics

Condensed Matter

Strongly Correlated Electrons

html + gif, original 9 double spaced text and 4 figures

Scientific paper

10.1103/PhysRevB.63.060407

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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