The internal friction and electrical and magnetic properties of La0.82Sr0.18MnO3 bulk materials

The low frequency internal friction and electric magnetic properties in La0.7Pb0.3MnO3 bulk materials

“…Similar with our previous results [14][15][16], the peak temperature of the two internal friction peaks coincide very well with T P1 and T P2 , suggesting the same origins for the internal friction peaks and the resistance peaks. As discussed above, the internal friction peak at high temperature, corresponding to the P1 resistance peak, originates from a transition from PM phase to FM phase.…”

“…In self-doped and potassium-doped LaMnO 3 [13][14][15], the double resistance peaks were also reported and the mechanism of AFM phase separating from the FM matrix was assigned to the P2 peak. In strontium-doped LaMnO 3 [16], a relatively high P2 peak was observed, and was explained to be associated with a process of structural phase transition. In our case, the P2 peak is higher than P1 peak, as in the strontium-doped LaMnO 3 [16], but there is no structural phase transition at temperatures around P2 peak in LPMO sample.…”

“…In strontium-doped LaMnO 3 [16], a relatively high P2 peak was observed, and was explained to be associated with a process of structural phase transition. In our case, the P2 peak is higher than P1 peak, as in the strontium-doped LaMnO 3 [16], but there is no structural phase transition at temperatures around P2 peak in LPMO sample.…”

Internal friction investigation of phase transformation in nearly stoichiometric LaMnO3+δ

“…Only a few studies have been done on the La/Mn/O system. Data have been found on "self-doped" La 0.8 MnO 3 materials, 22 on La 0.82 Sr 0.18 MnO 3 , 23 and on La 2/3 Sr 1/3 MnO 3 , 24 but all these materials were prepared from solid-state reactions. This paper deals with the investigation, by mechanical spectroscopy, of some physical properties of lanthanum manganite ceramics obtained by sintering of LaMnO 3+δ nanometric powders, prepared using two different soft chemistry processes, co-precipitation and hydrothermal synthesis.…”