Thermal hysteresis in electrical transport of charge ordered La0.5Ca0.5MnO3 manganites

Awana, V. P. S.; Tripathi, Rahul; Balamurugan, S.; Kumar, Amitabh; Dogra, Anjana; Kishan, H.

doi:10.1016/j.jallcom.2008.07.077

Cited by 16 publications

(9 citation statements)

References 15 publications

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“…The physical properties of La 1-x Ca x MnO 3 with different Ca concentration are well studied [2,20]. Recently, La 0.5 Ca 0.5 MnO 3 manganite have been the focus of scientific interest [21][22][23][24][25][26]. There are only few reports on the study of transport properties of Ag doped LCMO [27][28][29][30].…”

Section: -Introductionmentioning

confidence: 99%

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Effect of exceeding the concentration limit of solubility of silver in perovskites on the dielectric and electric properties of half doped lanthanum–calcium manganite

Rahmouni

Cherif

Smari

et al. 2015

Physica B: Condensed Matter

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Section: -Introductionmentioning

confidence: 99%

“…At our knowledge, the dielectric properties are not well investigated. In a recent works, more interest has been focused on investigating physical properties of La 0.5 Ca 0.5 MnO 3 [25,31,32] and magnetic/structural properties of silver-substituted La 0.5 Ca 0.5 MnO 3 compound [21,22].…”

Section: -Introductionmentioning

confidence: 99%

Effect of exceeding the concentration limit of solubility of silver in perovskites on the dielectric and electric properties of half doped lanthanum–calcium manganite

Rahmouni

Cherif

Smari

et al. 2015

Physica B: Condensed Matter

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“…The localization of the charge carriers will decrease the mobility of the charge carriers, weakening the DE interaction and metallic behavior is reduced [8][9][10]. Based on previous study, the existence of CO is always found in the half-doped manganites in which the ratio of Mn 3+ to Mn 4+ is 1:1 where the ions arranged themselves in an ordered arrangement reported in several divalent doped manga-nites such as La0.5Ca0.5MnO3 [11,12], Pr0.5Ca0.5MnO3 [13] and Nd0.5Ca0.5MnO3 [7]. In addition, the existence of CO state also can be observed in monovalent doped manganite.…”

Section: Introductionmentioning

confidence: 96%

Effect Of Co3+ Substitution on Electro-Magnetic Properties of Pr¬0.75¬Na¬0.25¬mno¬3 ¬and Nd¬0.75¬Na¬0.25¬mno¬3¬ Manganites

Mannan¹,

Razali²,

Shamsuddin³

et al. 2018

IJET

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This paper reports influences of cobalt (Co) substituted at Mn-site of Pr0.75Na0.25Mn1-xCoxO3 and Nd0.75Na0.25Mn1-yCoyO3 on structure, electrical transport and magnetic properties. All of the samples were prepared via standard solid state reaction method. X-ray diffraction measurement indicates that all samples were crystallized in an orthorhombic structure (space group Pnma). Resistivity measurement displays the x = 0 sample manifests an insulator behavior while metal-insulator transition was found at 108 K and 84 K for x = 0.02 and 0.05 respectively for Pr0.75Na0.25Mn1-xCoxO3. On the other hand, all of the samples for Nd0.75Na0.25Mn1-yCoyO3 showed insulator behavior down to low temperature and analysis of the resistivity change with respect to temperature, dlnρ/dT-1 versus T reveals a slope changes of resistivity have been recorded. Two obvious peaks were recorded from the analysis for y = 0.02 and 0.05 which can be suggested to the existence of charge order transition at the vicinity. For magnetic properties, x = 0 sample showed a paramagnetic-antiferromagnetic transition and further substitution of Co, x = 0.02 and 0.05, induce the paramagnetic-ferromagnetic transition and antiferromagnetic arrangement respectively. Meanwhile, further substitution of Co, y = 0.02 and 0.05 indicate antiferromagnetic transition with increasing TN as Co increased.

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“…Some interesting properties exhibited by these materials include ferromagnetism, 2,3 colossal magnetoresistance, 4,5 half metallicity, 6 orbital ordering, 7,8 the dynamic Jahn–Teller effect, 9 and the polaronic effect 10 . These properties arise from a variety of possible phase states, transitions, and intrinsic correlations of the crystal structure, magnetic characteristics, and transport properties.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure Analysis of Calcium‐Doped Lanthanum Manganites Prepared by Mechanosynthesis

Lira-Hernández

Jesús

Cortés-Escobedo³

et al. 2010

Journal of the American Ceramic Society

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We report results of crystal structure analyses of calcium‐doped lanthanum manganites, La1−xCaxMnO3, obtained by mechanosynthesis. The calcium to lanthanum ratio x was varied from 0 to 1 at increments of 0.1, allowing us to study changes in crystal structure with different degrees of calcium substitution, from LaMnO3 (x=0) to CaMnO3 (x=1). Metallic oxide precursors, Mn2O3, La2O3, and CaO, were mixed in stoichiometric proportions. The powder mixture was milled using a shaker mixer/mill. X‐ray powder diffraction was used to monitor the phase transformation as a function of the milling time. Rietveld refinement was used to structurally characterize the manganites. The results show that it is possible to obtain calcium‐doped lanthanum manganite by mechanosynthesis using a weight ratio of balls to powder of 12:1. After 4.5 h of milling time, the synthesis is completed; the time is independent of the calcium‐doping level. However, increase of the Ca2+ content leads to a monotonic decrease of the orthorhombicity factor b/a for calcium to lanthanum ratios between 0.2 and 0.8. When the doped level is increased, a peak displacement is observed, which is associated with a distortion of the crystal structure and variation in the cell parameter. All the manganites crystallized with the same O‐type orthorhombic perovskite structure as pure LaMnO3, with a space group Pnma. The structural distortion in the orthorhombic lattice with the Ca2+ content is associated with a partial oxidation of the manganese ion, the increment on vacancies, and the cationic substitution.

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Thermal hysteresis in electrical transport of charge ordered La0.5Ca0.5MnO3 manganites

Cited by 16 publications

References 15 publications

Effect of exceeding the concentration limit of solubility of silver in perovskites on the dielectric and electric properties of half doped lanthanum–calcium manganite

Effect of exceeding the concentration limit of solubility of silver in perovskites on the dielectric and electric properties of half doped lanthanum–calcium manganite

Effect Of Co3+ Substitution on Electro-Magnetic Properties of Pr¬0.75¬Na¬0.25¬mno¬3 ¬and Nd¬0.75¬Na¬0.25¬mno¬3¬ Manganites

Crystal Structure Analysis of Calcium‐Doped Lanthanum Manganites Prepared by Mechanosynthesis

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