Study of the effect of Cu doping in La0.7Sr0.3MnO3 perovskite materials employing on-line ultrasonic measurements

Short-range magnetic behavior in manganites La0.93K0.07Mn1- x Cu x O3 (0.0 ⩽ x ⩽ 0.09) above the Curie temperature

“…Some of these doped manganites show short-range local FM structures above T C [9,10], analogous to the randomly diluted Ising ferromagnets described by [11]. Specifically, Cu doping at B sites [12][13][14][15][16] are of special interest because besides structurally altering the lattice (changes in the length of the Mn-O bonds and the Mn-O-Mn angles), they also alter the composition of magnetic chains. In general, two types of magnetic interactions are identified in these materials: the ferromagnetic interaction [17], due to the double exchange interaction (Mn 3+ -O-Mn 4+ ) and the antiferromagnetic interaction [13,18], originated in super exchange (Mn 3+ -O-Mn 3+ or Mn 4+ -O-Mn 4+ ).…”

Structural, Optical and Electrical Properties of V2O5 Thin films at different Molarities by Spray pyrolysis method

“…Transition metal oxides, especially vanadium compounds gain immense interest due to their special physical and chemical properties, making them technological useful for nanoscale device application [1][2][3][4][5][6][7]. A thin film of Transition metal oxides has been a wide platform of research in recent years due to their application in technological aspects.…”

Double-doping Effect on Structural and Magnetic Properties of Perovskite Lanthanum Manganite

“…The Cu doping in La 0.7 Sr 0.3 MnO 3 perovskite materials was found to reduce the critical Cutie temperature T c with the rise of Cu content, which was attributed to the appearance of Cu 2+ ions in the lattice (most of the Cu ions in the B-site of this perovskite compound was considered to be divalent) 18,20 The decline of the ferromagnetic phase is due to the additional contribution of super-exchange interaction pairs of Cu 2+ -O-Mn 3+ , Cu 2+ -O-Mn 4+ and Cu 2+ -O-Cu 2+ . It was pointed out that, more Mn 4+ ions are added z E-mail: peter.ibrahim@pme.suezuni.edu.e.g ECS Journal of Solid State Science and Technology, 2022 11 073002 into the lattice and the concentration of Mn 3+ decreases with the increase of Cu 2+ content.…”

“…The study of the influence of double doping on the structural, magnetic, and electrical properties and the resultant applications were studied. [13][14][15][16][17][18][19] The Mn-site doping with a transition metal has more importance because it is directly modifying Mn 3+ -O-Mn 4+ network by changing Mn 3+ /Mn 4+ ratio and then electron e .g. density, which strongly affect the electron hopping process between Mn 3+ and Mn 4+ ions and the conduction mechanism by bringing a new exchange interactions between the Mn ion and the doped transition metal ions.…”

“…The electron-phonon interaction due to Jahn-Teller distortion results in the localization of the charge carriers and the suppression of the double exchange interaction, which in turn disfavors the metallicity and the ferromagnetism. 18,20 A remarkable and important research was done by W. J. Li et al, 13 if keeping the fixed ratio of Mn 3+ /Mn 4+ through modifying the content of Sr 2+ in the Cu-doping La 2−x Sr x MnO 3 system. This work makes us desire to continue studying more attributes to the influence of doping Cu ion in La (2+4x)/3 Sr (1-4x)/3 Mn 1−x Cu x O 3 system suggested by 13 to provide further identification of this system.…”