AC susceptibilities and size effect in Ln0.7(Sr,Ca)0.3MnO3 CMR manganites |
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| Affiliation: | 1. Laboratoire CRISMAT, U.M.R. 6508 CNRS, ISMRA et Université de Caen 6, Boulevard du Maréchal Juin, 14050 Caen Cedex, France;2. Materials Science Research Centre, Indian Institute of Technology, Madras 600036, India;1. Laboratoire de Physique Appliquée, Faculté des Sciences, Université de Sfax, B.P. 1171, Sfax 3000, Tunisia;2. Physics Department, Faculty of Sciences, Jouf University, P.O.BOX 2014, Sakaka, Aljouf, Saudi Arabia;3. Center for Functionalized Magnetic Materials (FunMagMa), Immanuel Kant Baltic Federal University, 236041, Kaliningrad, Russia;4. CMTR, ICMPE, UMR 7182 CNRS-UPEC, 2 rue Henri Dunant, F-94320 Thiais, France;1. Department of Physics, Faculty of Arts and Sciences, Abant Izzet Baysal University, Bolu 14280, Turkey;2. LEND, Faculty of Science and Technology, Jijel University, Jijel 18000, Algeria;1. Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, India;2. Academy of Scientific and Innovative Research (AcSIR), CSIR, Trivandrum, India |
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| Abstract: | The low field susceptibility versus temperature has been studied for the series of colossal magnetoresistive (CMR) manganites Ln0.7Ca0.3−xSrxMnO3 (Ln Pr, x = 0.10, 0.05, 0; LnNd, x = 0). The effect of the average size of the interpolated cation upon Tc is confirmed for the larger sizes (LnPr, x = 0.10, 0.05) showing a classical ferromagnetic behavior at low temperature in agreement with the neutron diffraction studies. For a smaller size of the A-site cation (LnPr or Nd, x = 0) an original behavior is observed: the χ′(T) curves show a spin-glass-like behavior with a cusp at Tcusp, whereas the neutron diffraction data in zero magneteic field evidence a ferromagnetic component starting around Tcusp. |
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