Studies on magneto-resistance, magnetization and thermoelectric power of Cr substituted La0.65Ca0.35Mn1−xCrxO3 (0≤x≤0.07) manganites

Manjunatha, S.; Rao, Ashok; Babu, P. D.; Tarachand,; Okram, G. S.

doi:10.1016/j.physb.2015.06.014

Cited by 21 publications

(1 citation statement)

References 38 publications

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“…The low-temperature ferromagnetic region transport mechanism of manganites usually depends on the various competing scattering mechanisms originated from grain/domain boundary, electron-electron, and electron-magnon scattering. To account the relative strengths of these competing mechanisms the low temperatures (T<T IM ) resistivity data is analyses using an empirical formula [26],…”

Section: Electrical Resistivitymentioning

confidence: 99%

Enhancement of temperature coefficient of resistance (TCR) and magnetoresistance (MR) of La_0.67–xRE_xCa_0.33MnO₃ (x = 0, 0.1; RE = Gd, Nd, Sm) system via rare-earth substitution

Pal¹,

Nagaraja²,

Rachana³

et al. 2020

Mater. Res. Express

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We investigated the influence of 10% substitution of rare-earth (RE) elements on the crystallographic, transport, and magnetic properties of La 0.67-x RE x Ca 0.33 MnO 3 (RE=Nd, Sm, and Gd, x=0.0, 0.1) manganite perovskite compounds. The bulk polycrystalline samples were synthesized using solidstate reaction method. The phase purity and crystal structure of studied samples were confirmed by room temperature X-ray diffraction followed by the Rietveld refinement analysis. A high temperature insulator to low temperature metal phase transition is observed in electrical transport measurement. We observed an enhancement in the temperature coefficient of resistance (TCR) and magnetoresistance (MR) by partially substituting La with RE ions. The maximum TCR≈22% and MR≈96% are observed in Gd doped sample. The magnetic transition temperature, T c , decreases from ∼254 K for the pristine sample to about ∼165 K for the Gd-doped sample. Our analysis of electrical and thermal transport data shows that the Small Polaron Hopping (SPH) is predominant at high temperatures conduction mechanism, whereas at low temperatures mechanism is dominated by electron-magnon scattering. The high temperature insulator paramagnetic phase to low temperature metallic ferromagnetic phase transitions are also observed in thermal conductivity and specific heat.

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Section: Electrical Resistivitymentioning

confidence: 99%

Enhancement of temperature coefficient of resistance (TCR) and magnetoresistance (MR) of La_0.67–xRE_xCa_0.33MnO₃ (x = 0, 0.1; RE = Gd, Nd, Sm) system via rare-earth substitution

Pal¹,

Nagaraja²,

Rachana³

et al. 2020

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

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Preparation and properties of La0.71Ca0.29Mn1−xCrxO3 polycrystalline composites

Yan

et al. 2018

J Mater Sci: Mater Electron

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Investigation of magneto-transport properties of the co-doped La1.6-xPrxCa1.4-xBaxMn2O7 (x = 0.2 and 0.4) double-layered manganite

Denbri

Mahamdioua

Meriche

et al. 2021

J Mater Sci: Mater Electron

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Studies on magneto-resistance, magnetization and thermoelectric power of Cr substituted La0.65Ca0.35Mn1−xCrxO3 (0≤x≤0.07) manganites

Cited by 21 publications

References 38 publications

Enhancement of temperature coefficient of resistance (TCR) and magnetoresistance (MR) of La_0.67–xRE_xCa_0.33MnO₃ (x = 0, 0.1; RE = Gd, Nd, Sm) system via rare-earth substitution

Enhancement of temperature coefficient of resistance (TCR) and magnetoresistance (MR) of La_0.67–xRE_xCa_0.33MnO₃ (x = 0, 0.1; RE = Gd, Nd, Sm) system via rare-earth substitution

Preparation and properties of La0.71Ca0.29Mn1−xCrxO3 polycrystalline composites

Investigation of magneto-transport properties of the co-doped La1.6-xPrxCa1.4-xBaxMn2O7 (x = 0.2 and 0.4) double-layered manganite

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Studies on magneto-resistance, magnetization and thermoelectric power of Cr substituted La0.65Ca0.35Mn1−xCrxO3 (0≤x≤0.07) manganites

Cited by 21 publications

References 38 publications

Enhancement of temperature coefficient of resistance (TCR) and magnetoresistance (MR) of La0.67–xRExCa0.33MnO3 (x = 0, 0.1; RE = Gd, Nd, Sm) system via rare-earth substitution

Enhancement of temperature coefficient of resistance (TCR) and magnetoresistance (MR) of La0.67–xRExCa0.33MnO3 (x = 0, 0.1; RE = Gd, Nd, Sm) system via rare-earth substitution

Preparation and properties of La0.71Ca0.29Mn1−xCrxO3 polycrystalline composites

Investigation of magneto-transport properties of the co-doped La1.6-xPrxCa1.4-xBaxMn2O7 (x = 0.2 and 0.4) double-layered manganite

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Resources

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Enhancement of temperature coefficient of resistance (TCR) and magnetoresistance (MR) of La_0.67–xRE_xCa_0.33MnO₃ (x = 0, 0.1; RE = Gd, Nd, Sm) system via rare-earth substitution

Enhancement of temperature coefficient of resistance (TCR) and magnetoresistance (MR) of La_0.67–xRE_xCa_0.33MnO₃ (x = 0, 0.1; RE = Gd, Nd, Sm) system via rare-earth substitution