Structural and Magnetic Properties of Perovskite Functional Nanomaterials La_1<i>-x</i>R<i>_x</i>FeO₃ (R = Co, Al, Nd, Sm) Obtained Using Sol-Gel.

Magnetic properties show that La 1 −x Al x FeO 3 has a weak ferromagnetism; with increasing Al 3+ concentration, magnetic properties of the samples showed an increasing trend, and the sintering time that continues to extend with the change of the magnetic properties has a little influence.

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Table 1 shows that the lattice parameters (a, b, c), crystal cell volume and particle size showed a trend of being smaller with the increase in Al 3+ doping concentration because La 3+ ion radiuses (0.274 nm) are replaced by a smaller Al 3+ ion radiuses [ 25 ].

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