Suppression of charge ordering phenomenon in nanocrystalline Nd0.67Ca0.33MnO3 manganite

Raju, K. C. James; Venkataiah, G.; Krishna, D.C.; Lakshmi, Y. Kalyana; Reddy, P. Venugopal

doi:10.1016/j.physleta.2010.10.027

Cited by 10 publications

(3 citation statements)

References 18 publications

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“…The linear nature is also observed for different applied magnetic fields. On the other hand, the sample exhibits a change of slope in the ρ versus T curve at 132 K for 0 T (114 K for 15 T), which may be attributed to the charge-ordering phenomenon [21]. Further, the variation of electrical resistivity with temperature in 15 T field is similar to that without magnetic field.…”

Section: Transport Propertiesmentioning

confidence: 82%

Metal-insulator transition and non-adiabatic small polaron hopping conduction in electron-doped Ca_0.85Pr_0.15MnO₃manganite

Khan

Pal

Bose³

2015

Phys. Scr.

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We report the detailed analysis of magnetic-field-dependent electrical transport properties of Ca 0.85 Pr 0.15 MnO 3 (CPMO) over a wide temperature range (5-300 K) in absence and presence of applied magnetic fields as high as 15 T. The resistivity undergoes a metal-insulator (M-I) transition. We report the effect of magnetic field on the transition temperature that decreases with the applied field. The M-I transition in this compound may be due to the spin-state transition from a high spin state to a low spin state of Mn 3+ ions. Temperature-dependent resistivity fitting above T MI (M-I transition temperature) suggests that electrical-conductivity carriers are mainly scattered by the electron-phonon interaction. In the semiconducting region, the conduction mechanism follows nonadiabatic, small-polaron hopping (SPH) above θ D /2 (θ D is the Debye temperature) and Mott-type variable range hopping (VRH) below θ D /2. It has also been found that the density of states (DOS) at the Fermi level increases, whereas the hopping energy W hop decreases with external magnetic field.

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Section: Transport Propertiesmentioning

confidence: 82%

Metal-insulator transition and non-adiabatic small polaron hopping conduction in electron-doped Ca_0.85Pr_0.15MnO₃manganite

Khan

Pal

Bose³

2015

Phys. Scr.

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“…It is found that spinel ferrites have these magnetic traits. Spinel oxides have a general chemical formula AB 2 O 4 , where A and B cations engrosses tetrahedral and octahedral locations formed by the oxygen anions respectively [2][3][4][5]. The optical and mechanical properties of spinels are discussed in detail [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

First principle study of structural, electronic, ferromagnetic, mechanical and thermoelectric properties of ZnMn₂X₄ (X = S and Se) spinels

Algrafy¹,

Tariq²,

Mahmood³

et al. 2020

Phys. Scr.

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The structural, mechanical, electro-magnetic and transport attributes of ZnMn2X4 (X = S and Se) spinels are explored by density functional theory (DFT). The stability in structures are affirmed by negative formation energy. Moreover, structural optimizations have suggested studied compounds are stable in ferromagnetic phase. This phenomenon is also endorsed in electronic properties by band structures and density of states. In magnetic properties, ferromagnetic nature is discussed in detail by pd hybridization process, double exchange model, exchange energies and exchange constants. It is found that negative exchange constant N0β lower the ground energy of system which is in conformity to the double exchange mechanism. Furthermore, the magnetic moment shifting observed at Mn site to nonmagnetic sites (Zn, S/Se) is due to quantum coupling of electrons. Finally transport properties are evaluated by finding electrical conductivity, thermal conductivity, Seebeck coefficient and power factor. All these parameters are in support of the compounds, which suggest novel spintronic applications.

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“…As the size of AFM system decreases, the surface always leads to a breaking of the sublattice pairing and thus gives rise to "uncompensated" surface spins, which can further result in anomalous magnetic properties [7][8][9][10], such as large moments, coercivities, and hysteresis loop shifts, spin-glass (SG) or cluster-glass-like behavior. Although extensive efforts have been devoted to the investigation of the magnetism of AFM nanostructures, the precise identification of the nature of the surface contribution has remained unclear and the intrinsic magnetism of the AFM nanostructures has not been very well understood.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and magnetic properties of antiferromagnetic Li2MnO3 nanoribbons

Zhang

Tang

2011

Physics Letters A

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Suppression of charge ordering phenomenon in nanocrystalline Nd0.67Ca0.33MnO3 manganite

Cited by 10 publications

References 18 publications

Metal-insulator transition and non-adiabatic small polaron hopping conduction in electron-doped Ca_0.85Pr_0.15MnO₃manganite

Metal-insulator transition and non-adiabatic small polaron hopping conduction in electron-doped Ca_0.85Pr_0.15MnO₃manganite

First principle study of structural, electronic, ferromagnetic, mechanical and thermoelectric properties of ZnMn₂X₄ (X = S and Se) spinels

Synthesis and magnetic properties of antiferromagnetic Li2MnO3 nanoribbons

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Suppression of charge ordering phenomenon in nanocrystalline Nd0.67Ca0.33MnO3 manganite

Cited by 10 publications

References 18 publications

Metal-insulator transition and non-adiabatic small polaron hopping conduction in electron-doped Ca0.85Pr0.15MnO3manganite

Metal-insulator transition and non-adiabatic small polaron hopping conduction in electron-doped Ca0.85Pr0.15MnO3manganite

First principle study of structural, electronic, ferromagnetic, mechanical and thermoelectric properties of ZnMn2X4 (X = S and Se) spinels

Synthesis and magnetic properties of antiferromagnetic Li2MnO3 nanoribbons

Contact Info

Product

Resources

About

Metal-insulator transition and non-adiabatic small polaron hopping conduction in electron-doped Ca_0.85Pr_0.15MnO₃manganite

Metal-insulator transition and non-adiabatic small polaron hopping conduction in electron-doped Ca_0.85Pr_0.15MnO₃manganite

First principle study of structural, electronic, ferromagnetic, mechanical and thermoelectric properties of ZnMn₂X₄ (X = S and Se) spinels