The effect of average A-site cation radius on TC in perovskite manganites |
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| Affiliation: | 1. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, People''s Republic of China;2. Center for Advanced Studies in Science and Technology of Microstructures, Nanjing University, Nanjing 210093, People''s Republic of China;1. Institute of Materials Science, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Hanoi, Vietnam;2. Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Hanoi, Vietnam;3. Faculty of Natural Sciences, Hai Phong University, Hai Phong, Vietnam;4. Center for Non-Destructive Evaluation, Atomic Energy Institute of Vietnam, Hanoi, Vietnam;5. Department of Engineering and Technology, Hong Duc University, Thanh Hoa, Vietnam;6. Department of Physics, Chungbuk National University, Cheongju 28644, South Korea;1. Center for Research in Nanoscience and Nanotechnology, University of Calcutta, JD-2, Salt Lake City, Kolkata 700098, West Bengal, India;2. Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India;3. Department of Physics, Seth Anandram Jaipuria College, 10, Raja Naba Krishna Street, Kolkata 700005, India;4. CMP Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700 064, India;1. Department of Physics, Saurashtra University, Rajkot, 360005, India;2. Department of Physics, Center of Education, Indian Institute of Teacher Education, Gandhinagar, 382016, India;3. Government Polytechnic, Rajkot, 360003, India;4. S.N. Arts, D.J. Malpani Commerce & B.N. Sarda Science College, Sangamner, Maharashtra, 422605, India;5. UGC DAE Consortium for Scientific Research, Khandwa Road, Indore, 452001, India;1. Laboratoire de Physique des Matériaux, Université de Sfax, Faculté des Sciences de Sfax, B.P. 1171, 3000 Sfax, Tunisia;2. Institut Supérieur de Biotechnologie de Sfax, Université de Sfax, B.P. 261, 3000 Sfax, Tunisia;3. Laboratoire des Technologies des Systèmes Smarts (LT2S), Centre de Recherche Numerique Sfax, Cité El Ons, Route de Tunis, Km 9, Sfax, B.P. 275, Sakiet Ezzit, 3021 Sfax, Tunisia;1. Universidad Autónoma de San Luis Potosí, Facultad de Ingeniería, Dr. Manuel Nava No. 8, Zona Universitaria Poniente, 78290 San Luis Potosí, Mexico;2. Universidad Autónoma del Estado de Hidalgo, Área Académica de Ciencias de la Tierra y Materiales, Carr. Pachuca-Tulancingo km. 4.5, 42039 Hidalgo, Mexico;3. Universidad Autónoma de San Luis Potosí, Facultad de Ciencias, Av. Chapultepec 1570, Priv. del Pedregal, 78295 San Luis Potosí, Mexico;1. Laboratory of Technologies for Smarts Systems, Numeric Research Center, Sfax Technopark, BP 275, 3021 Sakiet-ezzit, Tunisia;2. Institut Néel, CNRS et Université Joseph Fourier, BP 166, F-38042 Grenoble cedex 9, France |
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| Abstract: | ![]()
Three series of samples Ln0.7T0.3MnO3 (I), Ln0.7T0.3Mn0.9Cr0.1O3 (II), and Ln0.7T0.3Mn0.9Fe0.1O3 (III) (Ln=La, (La, Nd), (La, Y), T=Ca, CaSr, Sr) were prepared by sol–gel technique. The effect of the average A-site cation radius 〈rA〉 on the ferromagnetic transition temperature TC has been investigated. TC was obtained from M–T curves measured by vibrating sample magnetometer. For a little Nd3+ doped at the A-site, the TC of Ln0.7T0.3MnO3 (I) drops linearly with decreasing 〈rA〉 (1.18 Å<〈rA〉<1.25 Å). Similar behavior has been observed in series II and III, which have lower TC values than series I due to the weakening of the influence of double-exchange interactions upon substituting Fe and Cr for Mn. |
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