Crystal growth, transport and magnetic properties of rare-earth manganite

Effects of vacancy and Na doping on the structural, magnetic and transport properties of La0.8Pb0.1(□/Na)0.1MnO3

“…The obtained value of D is in an excellent agreement with those reported for other manganites polycrystalline [17,36,45,46]. In fact, the D value for LPMO is comparable to those found in the ground state of other FM insulating manganites such as La 0.8 Ca 0.2 MnO 3 [17,47], Pr 0.8 Pb 0.2 MnO 3 [36] and for LPNMO it is comparable to the FMM like La 0.7 Pb 0.3 MnO 3 [46]. In Table 2 [46].…”

“…In addition, the ZFC curve for LPMO shows a clear cusp at low temperature (T cusp ¼55 K), which is generally related to a spin-glass or a cluster-glass state. However, for LPNMO, the ZFC curves decrease smoothly and, as a result, it is difficult to distinguish the cusp in the ZFC curves (T cusp $ 85 K) and the branching of the ZFC-and FC-M(T) may be due-in addition to the formation of spin-glass or a cluster-glass state-to the pinning of domain walls at low fields as it is observed for some manganites [36]. Table 2 together with the theoretically paramagnetic effective moment.…”

“…According to this law, the zero field magnetization M(T,H¼0) should have temperature dependence [36] MðT,0Þ=Mð0,…”

The impact of disorder on magnetocaloric properties in Ti-doped manganites of La0.7Sr0.25Na0.05Mn(1−x)TixO3 (0≤x≤0.2)

“…The temperature range considered for fitting was 10-100 K for the x¼0.0, x¼0.1 and 10-60 K for x ¼0.2 compositions. According to this law, the zero field magnetization M (T, m 0 H ¼0) should have temperature dependence which can be well described [34]: where M (0, 0) and M (T, 0) is the spontaneous magnetization at T ¼0 K and at finite temperature, respectively, and the prefactor B is a characteristic constant of the spin waves at low temperature, which can be written as:…”

Hopping conduction mechanism and impedance spectroscopy analyses of La0.70Sr0.25Na0.05Mn0.70Ti0.30O3 ceramic

“…However, manganite exhibits an important effect known as colossal magneto-resistance (CMR) closely related to its magnetic transition between a paramagnetic/insulating phase and ferromagnetic/metal phase [8][9][10]. The insulator-metal transition is due to the partial doped of the Rare Earth (RE) site by Alkaline Earth (AE) ions, causing the manganese ions to be trained in a combination of Mn 3+ / Mn 4+ ions.…”