Ca-site substitution induced a metal–insulator transition in manganite CaMnO3

Effect of the sintering temperature on the properties of nanocrystalline Ca1−xSmxMnO3 (0≤x≤0.4) powders

“…Our data is in agreement with the reported behaviour for the lattice parameters variation with the x value in the Ca 1−x Sm x MnO 3 series (0 ≤ x ≤ 0.4) [14][15][16][24][25][26][27]30]. The calculated lattice parameters values for the CaMnO 3 phase also agree well with the data reported in the literature [24][25][26][27]30]. In what concerns substituted samples, our data are in agreement with the ones reported earlier for the same phases prepared by high temperature ceramic route (near 1573-1873 K) [14][15][16].…”

“…Some authors [24,25] have shown that the substitution of calcium by cerium or holmium in the Ca 1−x R x MnO 3 system, prepared by citrate route in the temperature range 1173-1533 K, induces a marked decrease in the electrical resistivity and a metal-insulator transition at high temperature. More recently, nanocrystalline Ca 1−x R x MnO 3−ı manganites (R = Ho, Eu) were synthesized as single-phase by a simple and instantaneous solution auto gel combustion method at low temperature, namely 1073 K for 18 h. These studies showed that all samples exhibit semiconductor behaviour.…”

Spin-phonon coupling and high-pressure phase transitions ofRMnO3(R=Caand Pr): An inelastic neutron scattering and first-principles study

“…The study of perovskite manganite RMnO 3 (R= Ca, La, Pr etc) has been of great relevance [6][7][8][9][10][11][12][13][14][15][16][17]. Among these, CaMnO 3 has received much interest in the past decade due to its structural [18], physical [19], magnetic [20], and thermo-electrical properties [21,22].…”

First principle investigation of electronic structure of CaMnO3 thermoelectric compound oxide

“…Among these oxides, the manganese oxide CaMnO 3 with perovskite type crystal structure has received much interest in the past decade due to its structural [9], topological [10], physical [11], magnetical [12] and TE properties [9,13,14]. As for the TE property, the titled manganite exhibits both high thermopower˛and relatively low total thermal conductivity Ä above room temperature [9].…”