Effect of iron doping on electrical, electronic and magnetic properties of La0.7Sr0.3MnO3

• Published in: Journal of physics. D, Applied physics Applied physics, 2009-09, Vol.42 (18), p.185410-185410 (5)
• Main Authors: Deshmukh, Alka V, Patil, S I, Bhagat, S M, Sagdeo, P R, Choudhary, R J, Phase, D M
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Magnetotransport phenomena, materials for magnetotransport; Manganites; Physics
• ISSN: 0022-3727; 1361-6463
• DOI: 10.1088/0022-3727/42/18/185410

The effect of 5% Fe doping at Mn site, on the valence band structure of La0.7Sr0.3MnO3 has been investigated. Polycrystalline samples of La0.7Sr0.3MnO3 and La0.7Sr0.3Mn0.95Fe0.05O3 have been prepared by the solid-state reaction route. The phase purity of these samples was confirmed using x-ray diffraction. Core-level x-ray photoelectron spectroscopy measurements were performed to study the changes in the chemical composition. The valence band spectroscopy measurements on these samples, using a synchrotron radiation source, show a considerable change in the density of states (DOSs) at the Fermi level with 5% Fe doping. The results are correlated with room temperature resistivity and magnetization data on these samples. These results suggest that though the DOSs at the Fermi level increase on Fe doping, the conduction in LSMO gets hampered. This may be a result of changes in the hybridization of the orbitals due to Fe doping which modifies the MnO6 octahedra and hence the Mn3+-O-Mn4+ network.