(La,Sr)(Mn,Me)O3 manganites doped with d metals: Study of charge compensation mechanisms by crystallographic and magnetic characterizations |
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| Affiliation: | 1. V.I. Vernadskii Institute of General & Inorganic Chemistry of UNAS, 03680 Kyiv, Ukraine;2. Institute of Magnetism of UNAS, 03142 Kyiv, Ukraine;1. Institute of Natural Science and Mathematics, Ural Federal University, Yekaterinburg, Russia;2. School of Advanced Materials and Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India;3. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India;1. Department of Physics, Payame Noor University, P. O. Box 19395-3697, Tehran, Iran;2. Nanostructure Lab, Physics Department, University of Guilan, Rasht, Iran;1. Department of Physics, Faculty of Science, Malayer University, Malayer, Iran;2. Department of Physics, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;3. Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia;4. Department of Physics, Jahrom University, Jahrom, Iran;1. Laboratoire de la Matière Condensée et des Nanosciences, Département de Physique, Faculté des Sciences University de Monastir, 5019, Tunisia;2. Institut Néel, CNRS et Université Joseph Fourier, BP 166, 38042 Grenoble, France;1. Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;2. Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;3. Biyonanotronic Medical Engineering Company, 34320 ?stanbul, Turkey;4. Institute of Inorganic Chemistry, RWTH Aachen University, D-52074 Aachen, Germany;5. Deanship of Preparatory Year, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;6. School of Materials Science and Engineering, University of New South Wales, Kensington, Sydney, NSW 2052, Australia;7. Department of Nano-medicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia |
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| Abstract: | A comparison between theoretically calculated unit cell volume and interatomic distances in the system La0.7Sr0.3Mn1?xMexO3+δ (where Me = Cu, Fe, Cr, Ti) and the experimental data obtained by the full-profile Rietveld X-ray analysis as well as an analysis of magnetic properties allowed us to suggest possible mechanisms of charge compensation occurring when d metals substitute for manganese. It has been shown that in the case when copper, iron, chromium and titanium ions substitute for manganese ions in the system La0.7Sr0.3Mn1?xMexO3 charge compensation is described by the model 2Mn3+ → Mn4+ + Cu2+, Mn3+ → Fe3+, Mn3+ → Cr3+ and Mn4+ → Ti4+, respectively. In the latter case, a decrease in oxygen nonstoichiometry occurs with increasing x. |
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