Magnetic properties of LaInO3-based perovskite-structure photoluminescent materials doped with Nd3+, Cr3+, and Mn3+ ions

Abstract

Single-phase ceramic samples of La1–xNdxInO3 (0.007 ≤ x ≤ 0.05), LaIn0.99M0.01O3, and La0.95Nd0.05In0.995M0.005O3 (M = Cr3+ and Mn3+) solid solutions have been prepared by solid-state reactions, and their crystal structure, magnetic field dependences of their specific magnetization at 5 and 300 K, and temperature dependences of their molar magnetic susceptibility have been studied. It has been shown that the 300-K specific magnetization of the La1–xNdxInO3 (x = 0.02, 0.05), La0.95Nd0.05In0.995M0.005O3 (M = Cr3+ and Mn3+), and LaIn0.99Mn0.01O3 solid solutions increases linearly with increasing magnetic field strength up to 14 T and that the magnitude of the 300-K specific magnetization of the La0.993Nd0.007InO3 and LaIn0.99Cr0.01O3 solid solutions increases linearly, but they have diamagnetic magnetization. At a temperature of 5 K, the magnetization of all the indates studied here increases nonlinearly with increasing magnetic field strength, gradually approaching magnetic saturation, without, however, reaching it in a magnetic field of 14 T. In the temperature range where the Curie–Weiss law is obeyed (5–30 K), the effective magnetic moments obtained for the Nd3+ ion (\({\mu _{effN{d^{3 + }}}}\)) in the La1–xNdxInO3 solid solutions with x = 0.007, 0.02, and 0.05 are 2.95μB, 3.09μB, and 2.75μB, respectively, which is well below the theoretical value \({\mu _{effN{d^{3 + }}}}\)= 3.62μB. The effective magnetic moments of the Cr3+ and Mn3+ ions in the LaIn0.99Cr0.01O3 and LaIn0.99Mn0.01O3 solid solutions are 3.87μB and 5.11μB, respectively, and differ only slightly from the theoretical values \({\mu _{effC{r^{3 + }}}}\)= 3.87μB and \({\mu _{effM{n^{3 + }}}}\)= 4.9μB.