M
M. T. Casais
Researcher at Spanish National Research Council
Publications - 108
Citations - 4312
M. T. Casais is an academic researcher from Spanish National Research Council. The author has contributed to research in topics: Neutron diffraction & Perovskite (structure). The author has an hindex of 33, co-authored 108 publications receiving 4019 citations. Previous affiliations of M. T. Casais include Carlos III Health Institute.
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Evolution of the Jahn-Teller distortion of MnO6 octahedra in RMnO3 perovskites (R = Pr, Nd, Dy, Tb, Ho, Er, Y): a neutron diffraction study.
TL;DR: All of the perovskites show a distortion of the MnO6 octahedra due to the orbital ordering characteristic of the Jahn-Teller effect of Mn3+ cations, and the stability of the crystal structure is also discussed in light of bond-valence arguments.
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Charge Disproportionation in R NiO 3 Perovskites: Simultaneous Metal-Insulator and Structural Transition in YNiO 3
J. A. Alonso,José Luis García-Muñoz,M. T. Fernández-Díaz,M. A. G. Aranda,María Jesús Martínez-Lope,M. T. Casais +5 more
TL;DR: The first observation of changes in the crystal symmetry at the metal-insulator transition in perovskites was made in this article, where the authors reported the presence of two alternating NiO octahedra with expanded (Ni1) and contracted (Ni2) Ni-O bonds and a magnetic structure.
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Magnetic structure of hexagonal R MnO 3 ( R = Y , Sc ) : Thermal evolution from neutron powder diffraction data
Ángel Muñoz,J. A. Alonso,María Jesús Martínez-Lope,M. T. Casais,José Luis Martínez,M. T. Fernández-Díaz +5 more
TL;DR: In this article, the magnetic structures of the hexagonal oxides of the space group (P6}-3cm) have been studied by neutron-diffraction experiments on powder samples, and it has been complemented with magnetic susceptibility and specific heat measurements.
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Finding universal correlations between cationic disorder and low field magnetoresistance in FeMo double perovskite series.
Mar García-Hernández,José Luis Martínez,María Jesús Martínez-Lope,M. T. Casais,José Antonio Alonso +4 more
TL;DR: The presence of a moderate level of antisite disorder is at the very root of low field magnetoresistance although effects such as disorder distribution, connectivity, or morphology add their contribution.
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Raman phonons as a probe of disorder, fluctuations, and local structure in doped and undoped orthorhombic and rhombohedral manganites
TL;DR: In this paper, a rationalization of the Raman spectra of orthorhombic and rhombohedral, stoichiometric and doped, manganese perovskites was presented.