Structural, Magneto-Transport Properties of Lead Doped NdMnO3 Ceramics. (25th March 2021)

• Record Type: Journal Article
• Authors: Singh, Vikash; Kumar, Pawan; Sharma, Subhash; Dwivedi, R. K.
• Is Part Of: ECS journal of solid state science and technology. Volume 10:Number 3(2021)
• Publication Date: 2021-03-25
• Subjects: Colossal Magneto resistance -- Paramagnetic and ferromagnetic phase -- Phase transition -- Magnetic Susceptibility and Magneto-electrical properties; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2162-8777/abedd6
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : Magnetic and magneto-transport properties of Pb doped NdMnO3 system have been reported. Polymeric precursor method has been used to synthesis of Nd1−x Pbx MnO3 (0.24 ≤ x ≤ 0.64) samples. Structural and transport properties have been studied by XRD and standard four probe technique respectively. Lattice parameters have been determined using the data from XRD pattern. All the samples Nd1−x Pbx MnO3 (0.24 ≤ x ≤ 0.64) have shown orthorhombic structure with space group Pbnm symmetry. The particles size of these powders has been found in the range of 22 nm to 35 nm. Insulator-metal transition (IMT) observed from resistivity ( ρ ) vs temperature plot, has been found to shift towards high temperature with x up to x = 0.44. Magnetic susceptibility measurements for all these samples from 77 to 300 K confirms the existence of ferromagnetism below Curie temperature. Phase diagram having the information about composition, magnetic phases and TC has been constructed. The Result of ln ( ρ ) vs T n, in paramagnetic region reveal that conduction occurs due to variable range hopping (VRH) of electrons in the band of localized states in the absence of electron–electron interactions for x ≤ 0.44 but for x = 0.54 and 0.64 it corresponds to conduction through VRH with a small gap due to electron correlation.