Fig. 7 Room temperature M vs. H of the La0.7Sr0.3MnO3 nanoparticles
prepared by thermal decomposition of the precursor A at 600, 700,
800, 900, and 1000◦C for 6 h before and after subtraction by LaMnO3
prepared with the same method and condition: (a) before subtraction,
(b) after subtraction (inset (a) shows their hysteresis loop and inset
(b) shows the subtraction of the M–H curve of the La0.7Sr0.3MnO3
nanoparticles prepared at 700 and 900◦C by LaMnO3, respectively)
dron as the structure changes from rhombohedral to cubic.
The observation of the M–H curves in Fig. 7(a) shows
no saturation of MS in the range of applied field measurement
(±10 kOe). There are two possible reasons that would
explain this phenomenon: (i) the applied magnetic field H is
not high enough to make the magnetization of LSMO samples
saturated; (ii) there is the paramagnetic phase contamination
in the samples. It is well known that the Sr doping
into LaMnO3 perovskite structure turns the sample ferromagnetic
at room temperature. Therefore, we subtracted
the M–H curve of the LSMO from the one of the LaMnO3
which was prepared using the same method and condition.
The results (inset in Fig. 7(b)) show that there is only the
Fig. 7 Room temperature M vs. H of the La0.7Sr0.3MnO3 nanoparticles
prepared by thermal decomposition of the precursor A at 600, 700,
800, 900, and 1000◦C for 6 h before and after subtraction by LaMnO3
prepared with the same method and condition: (a) before subtraction,
(b) after subtraction (inset (a) shows their hysteresis loop and inset
(b) shows the subtraction of the M–H curve of the La0.7Sr0.3MnO3
nanoparticles prepared at 700 and 900◦C by LaMnO3, respectively)
dron as the structure changes from rhombohedral to cubic.
The observation of the M–H curves in Fig. 7(a) shows
no saturation of MS in the range of applied field measurement
(±10 kOe). There are two possible reasons that would
explain this phenomenon: (i) the applied magnetic field H is
not high enough to make the magnetization of LSMO samples
saturated; (ii) there is the paramagnetic phase contamination
in the samples. It is well known that the Sr doping
into LaMnO3 perovskite structure turns the sample ferromagnetic
at room temperature. Therefore, we subtracted
the M–H curve of the LSMO from the one of the LaMnO3
which was prepared using the same method and condition.
The results (inset in Fig. 7(b)) show that there is only the
การแปล กรุณารอสักครู่..
