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The properties of La0.5-xNdxBa0.5CoO3 (0≤ x ≤0.425) has been investigated. All samples show a cubic structure at room temperature. The Curie temperature TC and the estimated molecular magnetic moment of the samples at 5K decrease monotonically with increasing Nd-doping level. The results are discussed in terms of the double exchange (DE) interaction associated with the variation of Co-O bond length and Co-O bond angle due to the substitution of smaller Nd3+ ions for larger La3+ ions. At low temperature, the ferromagnetic (FM) interaction is greatly suppressed by the Nd-doping, illustrating a special noncollinear spin structure. The spin state of Co ions derived from the Curie constant is not affected by the Nd doping and remains an intermediate spin state. The electric resistance measurements show that the conduction of the materials belongs to the thermal activation process below TC, while it belongs to the variable range hopping conduction of polarons over TC except for parent La0.5Ba0.5CoO3. Keywords—La0.5-xNdxBa0.5CoO3; immediate spin state; noncollinear spin structure; electron transport

Properties of Nd Doped La0.5Ba0.5CoO3 Pervoskite