Structural and magnetic characteristics of manganites in La_1−c+xSr_c−xMn_1−xNi_xO₃system

Structural and electromagnetic characteristics of perovskites in La1–c–xSrc+xMn1–xMe4+xO3systems (Me=Ge, Ti)

“…x O 3 shifted phase boundary "rhombohedral-orthorhombic structure" to higher values of "c" [8] in comparison with classical phase diagram for La 1-c Sr c MnO 3 system [7], while Ga 3+ in La 1-c Sr c Mn 1-x Me 3+…”

“…Simultaneously, concentration transition "semiconductor-metal" displaced in the region of higher "c" independently of substituting ion [8,9]. Moreover, for divalent ions the displacement of this transition is greater than the displacement of the boundary "rhombohedralorthorhombic structure".…”

“…Moreover, for divalent ions the displacement of this transition is greater than the displacement of the boundary "rhombohedralorthorhombic structure". As a result, manganites with rhombohedral structure can exhibit semiconducting type of temperature dependence of conductivity, even at high value of "c", when the charge carrier concentration is high enough [8,9].…”

BEEF-vdW+U method applied to perovskites: thermodynamic, structural, electronic, and magnetic properties

“…It was reported that the octahedral rotation (GFO distortion) has a major effect on the ferromagnetic stability [81], band gap [82], and Mott transition [62] of materials. At room temperature, the MO6 octahedra tilt in response to the size mismatch between the La and M cation, giving rise to low-symmetry lattice structures [83][84][85][86], with the M-O-M bond angle ( M O M θ − − ) decreasing from 180 to 145 -170 °. Therefore, the M-O-M bond angle can be used to some extent as a measure of the GFO distortion.…”