Abstract
The specific features revealed in the behavior of the parameters of the crystal structure and the lattice dynamics of the La1 − x Ca x MnO3 + δ manganites upon the transition to a magnetically ordered state are investigated using X-ray powder diffraction and inelastic neutron scattering. The results obtained are explained in terms of an inhomogeneous state of the samples. This state manifests itself in the form of local regions that are enriched or depleted in charge carriers, with the former regions characterized by the highest temperature of ferromagnetic ordering in the system under investigation. A comparison of the evolution of the crystal structure with variations in the temperature both in the presence and in the absence of a magnetic field has demonstrated that the inhomogeneities are eliminated by an external magnetic field and that the regions enriched in charge carriers become predominant in the system.
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Original Russian Text © S.Kh. Estemirova, S.G. Titova, V.F. Balakirev, I.A. Samatov, I.L. Sashin, 2007, published in Fizika i Khimiya Stekla.
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Estemirova, S.K., Titova, S.G., Balakirev, V.F. et al. Magnetic and structural inhomogeneities of the La1 − x Ca x MnO3 + δ manganites. Glass Phys Chem 33, 356–361 (2007). https://doi.org/10.1134/S1087659607040098
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DOI: https://doi.org/10.1134/S1087659607040098