Finite size effect and phase diagram of ultra-thin La0.7Sr0.3MnO3 |
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Authors: | Bongju Kim Daeyoung Kwon Jong Hyun Song Yasuyuki Hikita Bog G Kim Harold Y Hwang |
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Institution: | 1. Department of Mathematics and Physics “Ennio De Giorgi”, University of Salento, Via Arnesano, 73100 Lecce, Italy;2. National Nanotechnology Laboratory (NNL)-Nanoscience Institute-CNR, Via Arnesano, 73100 Lecce, Italy |
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Abstract: | La0.7Sr0.3MnO3 (LSMO) ultra-thin films have been grown by pulsed laser deposition in conditions optimized for cation stoichiometry and bulk-like physical properties in the thick limit. Through electrical transport and magnetic measurements, a phase diagram is constructed as a function of film thickness. With decreasing thickness, the LSMO films cross over at high temperatures from a paramagnetic metal to a paramagnetic insulator, and at low temperatures from a ferromagnetic metal to a ferromagnetic insulator, in close similarity to that observed for varying the electronic bandwidth in bulk manganites. |
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