Neutron diffraction study of Pr1 − xCaxMnO3 perovskites

Double “Mn3+” Stripes in Bi1-xSrxMnO3: New Type of Charge Ordering at Room Temperature

“…remains intense and is associated to a system of satellites which involves q ≈ 0.4. This result is consistent with those reported in refs , for Bi 0.2 Ca 0.8 MnO 3 , and shows, important, that the Bi 1 - x Ca x MnO 3 manganites behave like Ln 1 - x Ca x MnO 3 , − the modulation vectors following the x values. The comparison between the two [010] ED patterns clearly shows that the satellites associated to the Bragg reflections of the perovskite subcell, keep unchanged this P− or I− type subcell symmetry, which is directly correlated to the octahedra tilt and distortion system.…”

Double “Mn3+” Stripes in Bi1-xSrxMnO3: New Type of Charge Ordering at Room Temperature

“…remains intense and is associated to a system of satellites which involves q ≈ 0.4. This result is consistent with those reported in refs , for Bi 0.2 Ca 0.8 MnO 3 , and shows, important, that the Bi 1 - x Ca x MnO 3 manganites behave like Ln 1 - x Ca x MnO 3 , − the modulation vectors following the x values. The comparison between the two [010] ED patterns clearly shows that the satellites associated to the Bragg reflections of the perovskite subcell, keep unchanged this P− or I− type subcell symmetry, which is directly correlated to the octahedra tilt and distortion system.…”

Metal‐Organic Chemical Vapor Deposition (MOCVD) Synthesis of Heteroepitaxial Pr0.7Ca0.3MnO3 Films: Effects of Processing Conditions on Structural/Morphological and Functional Properties

“…All the measured samples present also a blocking temperature ( T b ) of ≈50 K below which ZFC measurements show smaller magnetization values than FC ones. Both temperatures, T c and T b , are in agreement with literature reports as well as with the reported phase diagram of PCMO samples, which considers the system described as a canted antiferromagnetic structure for T > T c followed by the onset of a FM phase for T = T c .…”

Oxygen Evolution at Manganite Perovskite Ruddlesden-Popper Type Particles: Trends of Activity on Structure, Valence and Covalence

“…The lattice parameters and the space groups of the P-series, Pnma (no. 62), are consistent with that of earlier reports [41,42]. Although the ionic radius of Pr 3+ (1.13 Å) is close to that of Ca 2+ (1.12 Å) [43], the lattice constants increase with the increase of Pr content, because the Mn-O bond length increases with increasing electron occupation of the antibonding Mn- e g –O-2 p levels.…”

Double “Mn3+” Stripes in Bi1-xSrxMnO3: New Type of Charge Ordering at Room Temperature

“…remains intense and is associated to a system of satellites which involves q ≈ 0.4. This result is consistent with those reported in refs , for Bi 0.2 Ca 0.8 MnO 3 , and shows, important, that the Bi 1 - x Ca x MnO 3 manganites behave like Ln 1 - x Ca x MnO 3 , − the modulation vectors following the x values. The comparison between the two [010] ED patterns clearly shows that the satellites associated to the Bragg reflections of the perovskite subcell, keep unchanged this P− or I− type subcell symmetry, which is directly correlated to the octahedra tilt and distortion system.…”

Metal‐Organic Chemical Vapor Deposition (MOCVD) Synthesis of Heteroepitaxial Pr0.7Ca0.3MnO3 Films: Effects of Processing Conditions on Structural/Morphological and Functional Properties

“…All the measured samples present also a blocking temperature ( T b ) of ≈50 K below which ZFC measurements show smaller magnetization values than FC ones. Both temperatures, T c and T b , are in agreement with literature reports as well as with the reported phase diagram of PCMO samples, which considers the system described as a canted antiferromagnetic structure for T > T c followed by the onset of a FM phase for T = T c .…”

Oxygen Evolution at Manganite Perovskite Ruddlesden-Popper Type Particles: Trends of Activity on Structure, Valence and Covalence

“…The lattice parameters and the space groups of the P-series, Pnma (no. 62), are consistent with that of earlier reports [41,42]. Although the ionic radius of Pr 3+ (1.13 Å) is close to that of Ca 2+ (1.12 Å) [43], the lattice constants increase with the increase of Pr content, because the Mn-O bond length increases with increasing electron occupation of the antibonding Mn- e g –O-2 p levels.…”

Double “Mn3+” Stripes in Bi1-xSrxMnO3: New Type of Charge Ordering at Room Temperature

“…remains intense and is associated to a system of satellites which involves q ≈ 0.4. This result is consistent with those reported in refs , for Bi 0.2 Ca 0.8 MnO 3 , and shows, important, that the Bi 1 - x Ca x MnO 3 manganites behave like Ln 1 - x Ca x MnO 3 , − the modulation vectors following the x values. The comparison between the two [010] ED patterns clearly shows that the satellites associated to the Bragg reflections of the perovskite subcell, keep unchanged this P− or I− type subcell symmetry, which is directly correlated to the octahedra tilt and distortion system.…”

Metal‐Organic Chemical Vapor Deposition (MOCVD) Synthesis of Heteroepitaxial Pr0.7Ca0.3MnO3 Films: Effects of Processing Conditions on Structural/Morphological and Functional Properties

“…All the measured samples present also a blocking temperature ( T b ) of ≈50 K below which ZFC measurements show smaller magnetization values than FC ones. Both temperatures, T c and T b , are in agreement with literature reports as well as with the reported phase diagram of PCMO samples, which considers the system described as a canted antiferromagnetic structure for T > T c followed by the onset of a FM phase for T = T c .…”

Oxygen Evolution at Manganite Perovskite Ruddlesden-Popper Type Particles: Trends of Activity on Structure, Valence and Covalence

“…The lattice parameters and the space groups of the P-series, Pnma (no. 62), are consistent with that of earlier reports [41,42]. Although the ionic radius of Pr 3+ (1.13 Å) is close to that of Ca 2+ (1.12 Å) [43], the lattice constants increase with the increase of Pr content, because the Mn-O bond length increases with increasing electron occupation of the antibonding Mn- e g –O-2 p levels.…”