Magnetic Properties of Ce1−xNdxTiO3 and Some Solid Solution Orthotitanates Ln1−xLn′xTiO3 (Ln and Ln′=La to Sm; 0≤x≤1)

A reinvestigation of nearly stoichiometric RTiO3 samples shows that (1) the transition from ferromagnetic to antiferromagnetic Ti–O–Ti interactions with increasing R3+-ion radius r3+ occurs at r3+≈1.11 Å where orthorhombic (Pbnm) RMO3 perovskites universally change structure from a cooperative rotation of undistorted to distorted MO6/2 octahedra about the orthorhombic b-axis, (2) the size of polaronic holes decreases progressively with r3+ from about ten Ti sites in LaTiO3 to small polarons in GdTiO3, (3) the strength of the R–O–Ti interactions increases with the spin of the R3+ ion in the ferromagnetic compounds, (4) the saturation magnetization of the ferromagnetic TiO3 array at 5 K and the Curie temperature TC both increase with decreasing r3+ where the R3+ ions have no spin, and (5) there is no evidence of ‘cluster-glass’ behaviour where there is no variance of the R3+-ion radii. The cooperative Jahn–Teller orbital ordering and small-polaron behaviour of the ferrimagnetic and ferromagnetic compounds would favour localized Ti-3d electrons. However, the lack of saturation to 1 μB/Ti of the ferromagnetic TiO3 array in the absence of a spin on the R3+ ion suggests a separation of an orbitally ordered ferromagnetic phase and an orbitally disordered paramagnetic phase.

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Magnetic Properties of Ce1−xNdxTiO3 and Some Solid Solution Orthotitanates Ln1−xLn′xTiO3 (Ln and Ln′=La to Sm; 0≤x≤1)

Cited by 3 publications

References 19 publications

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Magnetic Properties of Ce1−xNdxTiO3 and Some Solid Solution Orthotitanates Ln1−xLn′xTiO3 (Ln and Ln′=La to Sm; 0≤x≤1)

Cited by 3 publications

References 19 publications

Magnetic Properties of LnTi0.5V0.5O3 (Ln=Ce and Pr)

Magnetic Properties of LnTi0.5V0.5O3 (Ln=Ce and Pr)

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Localized or itinerant TiO3electrons in RTiO3perovskites

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Product

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Localized or itinerant TiO₃electrons in RTiO₃perovskites