Physical properties of La1−xPbxMnO3 perovskites

Ultrasonic and elastic moduli evidence for Curie temperature (Tc) in Sm1−xSrxMnO3 perovskite magnetic materials at x=0.25, 0.30, 0.37, 0.40 and 0.44

“…The structural, magnetic and electron transport properties of mixed valence manganites of R 1−x A x MnO 3 (where R is rare earth element, A divalent alkaline earth element) have been attracted much attention in recent years [1][2][3][4]. The interest is caused by observation of huge magnetoresistance (MR) near T c of paramagnetic (PM)-ferromagnetic (FM) transitions of manganites in R 1−x A x MnO 3 with 0.2 < x < 0.5.…”

Physical properties of La1−xPbxMnO3 perovskites with 0.24≤x≤0.40

“…The measurements performed on perovskites with 0.1 6 x 6 0.5 evidenced differences in magnetizations of ZFC and FC samples, indicating a spin-glass or cluster-glass state. When the Pb content is changed from x = 0.24 to 0.40, the saturation magnetizations increased [7]. A compositional modulation of the Curie temperatures was also reported in La 1Àx Pb x MnO 3 system [3].…”

“…Magnetic properties [1][2][3][4][5][6][7], resistivities [8][9][10][11][12][13], electronic structure [14] or positron annihilation measurements [1] were performed. Since the above perovskites are rather difficult to be obtained, some contradictory results were obtained.…”

Crystal Structures, Magnetic and Electrical Properties of Manganese Perovskites

“…A small irreversibility was shown in the magnetizations of samples field cooled and zero field cooled. This irreversibility decreases when the lead content is higher [11]. The Curie temperatures, T C , increase linearly from 285 K for x=0.24 to 348 K at x=0.40.…”