The effect of Ga doping in Nd0.7Sr0.3MnO3 system

Ying, Yue; Fan, Jiyu; Pi, Li; Hong, Bo; Tan, Shun; Zhang, Yuheng

doi:10.1016/j.ssc.2007.09.002

Cited by 9 publications

(3 citation statements)

References 17 publications

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“…Generally, Nd 0.7 Sr 0.3 MnO 3 perovskite undergoes a metal-semiconductor transition at the temperature T MS of 229-239 K, [17,18]. That is usually accompanied by a FM-PM transition at the Curie temperature T C .…”

Section: Introductionmentioning

confidence: 99%

Structural, electrical conductance and complex impedance analysis of (Nd1−xCex)0.7Sr0.3MnO3 (0≤x≤0.20) perovskite

Bellouz

Kallel

Khirouni

et al. 2015

Ceramics International

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International audiencePolycrystalline samples of (Nd1−xCex)0.7Sr0.3MnO3 (x=0, 0.10 and 0.20) were prepared by a high-temperature solid-state reaction technique. The X-ray diffraction study has shown that all the samples exhibit a single phase with orthorhombic structure (space group Pnma). From the resistivity data, it is found that all the samples show metal to semiconductor transition and the transition temperature decreases with the Ce doping. The complex impedance has been investigated in the temperature range 80–320 K and in the frequency range 40 Hz–1 MHz. AC conductance analyses indicate that the conduction mechanism is strongly dependent on temperature and frequency. The impedance plane plot shows semicircle arcs at different temperatures and an electrical equivalent circuit has been proposed to explain the impedance results. The activation energies obtained from the conductance is slightly higher than that from time relaxation analyse

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Section: Introductionmentioning

confidence: 99%

Structural, electrical conductance and complex impedance analysis of (Nd1−xCex)0.7Sr0.3MnO3 (0≤x≤0.20) perovskite

Bellouz

Kallel

Khirouni

et al. 2015

Ceramics International

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“…Besides these factors mentioned above, it is also reported that the microstructure defects, grain/phase boundaries, and various inhomogeneous factors are closely related to the transport properties of manganites due to the resistivity is the structure-sensitive parameters [10], and can induce various novel effects as interface-dependent ER effect, MR effect [11,12], EPIR effect [13][14][15] and low field magnetoresistance (LFMR) effect [16,17]. * Author for correspondence (cpyang@hubu.edu.cn) For the NdSrMnO system with doping ratio x = 0.3, Nd 0.7 Sr 0.3 MnO y generally exhibits an optimal double exchange interaction (DE) accompanied with the Curie temperatures of 229-239 K, and the electromagnetic transport is comprehensively investigated [18][19][20][21][22][23][24]. In this work, an unusual electrical transport behaviour is observed in the NSMO ceramics prepared by solid-state reaction and sequentially thermal-pressure treatment.…”

Section: Introductionmentioning

confidence: 99%

The enhanced interface effect induced by thermal pressure in Nd0.7Sr0.3MnO y ceramics

Chen

Shi

et al. 2016

Bull Mater Sci

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Polycrystalline ceramics Nd 0.7 Sr 0.3 MnO y prepared by solid-state reaction were treated under high pressure of 9 GPa and temperature of 1000 K. The electrical transport behaviour of samples were investigated by a variable temperature system and a peculiar transport character was found at low temperature of 120 K, the I-V showed an obvious step-shape behaviour with the increase in the measurement voltages; at much lower temperature of 12.3 K, the I-V curves exhibited a notable symmetric hysteresis at a critical voltage of 4.5 V, although a linear I-V behaviour at 293 K. On the other hand, the R-T measurement revealed that the resistivity peak (resistivity at T MI ) disappeared gradually and is replaced by a resistivity platform with the increase in the load currents, surprisingly, the resistivity platform broadened with continuous increase in the load currents but weakened when an external magnetic field was applied. All of these phenomena were not observed for the un-treated sample. The particle attenuated and the enhanced interface effect which resulted from the violent thermal-pressure treatment was responsible for the unique electromagnetic transport.

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“…Generally, Nd 0.7 Sr 0.3 MnO 3 perovskite undergoes a metal-insulator transition at the temperature 𝑇 MI of 229-239 K, [16,17] that is usually accompanied by a ferromagnetism-paramagnetism transition at the Curie temperature 𝑇 𝐶 . The correlating electron-magnetic phase transitions are explained within the model considering a competition between double exchange (DE), superexchange (SE) interactions and electron-phonon interactions in the lattice with John-Teller (JT) distortion.…”

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confidence: 99%

Alternating-Current Transport Properties of the Interface between Nd_0.7Sr_0.3MnO₃Ceramic and a Ag Electrode

Chen¹,

Yang²,

Luo³

et al. 2012

Chinese Phys. Lett.

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Electrical transport properties of the interface between a Nd0.7Sr0.3MnO3 ceramic and a Ag electrode are investigated using the ac impedance over a wide temperature and frequency ranges. The ac impedance measurements give the compressed semicircle arcs at different temperatures, which are used for the analysis of different contributions to electrical transport based on an electrical equivalent circuit. A significant interface-dependent electroresistance effect of 530% is clearly developed around the metal-insulator transition temperature 130 K, which is confirmed as the interface-layer dependent Curie temperature by the plot of interfacial conductance with frequency at different temperatures.

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The effect of Ga doping in Nd0.7Sr0.3MnO3 system

Cited by 9 publications

References 17 publications

Structural, electrical conductance and complex impedance analysis of (Nd1−xCex)0.7Sr0.3MnO3 (0≤x≤0.20) perovskite

Structural, electrical conductance and complex impedance analysis of (Nd1−xCex)0.7Sr0.3MnO3 (0≤x≤0.20) perovskite

The enhanced interface effect induced by thermal pressure in Nd0.7Sr0.3MnO y ceramics

Alternating-Current Transport Properties of the Interface between Nd_0.7Sr_0.3MnO₃Ceramic and a Ag Electrode

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The effect of Ga doping in Nd0.7Sr0.3MnO3 system

Cited by 9 publications

References 17 publications

Structural, electrical conductance and complex impedance analysis of (Nd1−xCex)0.7Sr0.3MnO3 (0≤x≤0.20) perovskite

Structural, electrical conductance and complex impedance analysis of (Nd1−xCex)0.7Sr0.3MnO3 (0≤x≤0.20) perovskite

The enhanced interface effect induced by thermal pressure in Nd0.7Sr0.3MnO y ceramics

Alternating-Current Transport Properties of the Interface between Nd0.7Sr0.3MnO3Ceramic and a Ag Electrode

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Product

Resources

About

Alternating-Current Transport Properties of the Interface between Nd_0.7Sr_0.3MnO₃Ceramic and a Ag Electrode