Effect of Pr-Ca substitution on the transport and magnetic behavior of LaMnO3 perovskite

Thaker, C. M.; Rayaprol, Sudhindra; Mavani, K. R.; Rana, D. S.; Sahasrabudhe, M.S.; Patil, S. F.; Kuberkar, D. G.

doi:10.1007/s12043-002-0213-2

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…All the samples exhibit metal to insulator transition at T P , which increases with Ba-content (as indicated in the small brackets in figure 3). Thaker et al [25] have reported the transition temperature ∼135 K for LPCMO sample, which increases upon the substitution of Ba 2+ at Ca 2+ site, as observed for the present case of LPCBMO system. Also, with applied magnetic field, T P shifts towards higher temperature.…”

Section: Resultssupporting

confidence: 83%

“…62)). The similar distorted orthorhombic structure was reported for LPCMO (x = 0.00) compound [25,26]. Samples possess orthorhombic unit cell, where with the increase in Bacontent (x), lattice parameters and cell volume increase.…”

Section: Methodssupporting

confidence: 75%

“…It is clearly seen that with the increase in applied magnetic field, resistance gets suppressed indicating the negative MR in all the samples understudy. Thaker et al [25] have reported the negative MR in LPCMO sample. Also, with increase in Ba-content, resistance decreases which is more clearly shown in last plot of figure 3.…”

Section: Resultsmentioning

confidence: 96%

“…Large temperature sensitivity has been observed in the present study of LPCBMO system. In this study, the results of the studies on LPCBMO compounds have been compared with the results of La 0.5 Pr 0.2 Ca 0.3 MnO 3 (LPCMO) (x = 0.00; starting member of the series) compound, reported earlier by Thaker et al [25] and Mavani et al [26].…”

Section: Introductionmentioning

confidence: 99%

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Investigations on structural disorder-induced modifications in the transport behaviour of rare-earth manganites

et al. 2016

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The results of the studies on structural disorder-induced modifications in the transport behaviour of La 0.5 Pr 0.2 Ca 0.3−x Ba x MnO 3 (LPCBMO) (0.05 ≤ x ≤ 0.30) manganites were reported. Structural studies using X-ray diffraction (XRD) measurements confirmed the single phasic nature of all the samples without any detectable impurities. The A-site size disorder (σ 2 A) increased from 3.81 × 10 −5 (x = 0.05) to 14.9 × 10 −5 (x = 0.30). With the increase in structural disorder in LPCBMO system, the transport improved for the range: 0.15 ≤ x ≤ 0.30, which can be ascribed to the enhancement in one electron bandwidth which dominates over the structural disorder effect, while for lower values of x, strong competition existed between size disorder and one electron bandwidth. Below 50 K, all ρ-T plots showed resistivity minimum behaviour, which modified with disorder. This behaviour was discussed in detail on the basis of electron-electron interaction having the form: ρ = [1/(σ 0 + BT 1/2)] + ρ n T n. Variation in temperature sensitivity with disorder was also discussed in context of granular morphology and phase segregation scenario.

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