Disorder induced phase segregation in La2/3Ca1/3MnO3 manganites

Details Disorder induced phase segregation in La2/3Ca1/3MnO3 manganites Disorder induced phase segregation in La2/3Ca1/3MnO3 manganites

2002-01-24

arxiv.org/abs/cond-mat/0201436v2

Physics

Condensed Matter

Materials Science

3 pages, 4 figures. Submitted to Phys. Rev. Lett. Figure 1 replaced

Scientific paper

10.1103/PhysRevB.68.094411

Neutron powder diffraction experiments on La2/3Ca1/3MnO3 over a broad temperature range above and below the metal-insulator transition have been analyzed beyond the Rietveld average approach by use of Reverse Monte Carlo modelling. This approach allows the calculation of atomic pair distribution functions and spin correlation functions constrained to describe the observed Bragg and diffuse nuclear and magnetic scattering. The results evidence phase separation within a paramagnetic matrix into ferro and antiferromagnetic domains correlated to anistropic lattice distortions in the vicinity of the metal-insulator transition.

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