Domain structure of the antiferromagnetic insulating state in Nd0.5Sr0.5MnO3 |
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| Institution: | 1. B. Verkin Institute for Low Temperature Physics & Engineering, National Academy of Science of Ukraine, 47 Lenin Ave., 61164 Kharkov, Ukraine;2. Research Institute for Materials, High Field Magnet Laboratory, University of Nijmegen, Toernooiveld 1, NL-6525 ED Nijmegen, Netherlands;3. Department of Physics & Astronomy, The University of Edinburgh, Mayfield Road, Edinburg EH9 3JZ, UK;4. Department of Physics, University of Warwick, Coventry CV4 7AL, England, UK;1. Department of Chemical Engineering, University of California, Davis, Davis, CA 95616, United States;2. Department of Materials Science and Engineering, University of California, Davis, Davis, CA 95616, United States;3. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States;4. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, United States;5. The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37830, United States;6. Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY 14853, United States;1. Tver State University, 170100 Zheliabova 33, Tver, Russia;2. National University of Science and Technology “MISiS”, 119049, Moscow, Russia;3. Technische Universität Darmstadt, Institut für Materialwissenschaft, Petersenstr. 23, 64287, Darmstadt, Germany;4. Lomonosov Moscow State University, Physics Faculty, Moscow, 119992, Russia;5. Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain;1. Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan;2. Department of Electronic Engineering, National Kaohsiung Normal University, Kaohsiung 824, Taiwan;3. Department of Electronics Engineering and Computer Science, Tung Fang Design University, Kaohsiung 829, Taiwan;4. Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 70101, Taiwan |
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| Abstract: | Optical reflectivity studies of the ferromagnetic metal (FMM) to antiferromagnetic insulator (AFI) phase transition were performed on Nd0.5Sr0.5MnO3 single crystals in a wide temperature and magnetic field range. The formation of a domain structure in the AFI state was observed. On the basis of the experimental results and symmetry analysis we conclude that these domains are crystal twins, confirming the symmetry lowering of the crystal at this phase transition. The twin domain structure of the AFI state in the Nd0.5Sr0.5MnO3 is visible in reflected unpolarized light due to a different tilting of the surface of the domains. We find no evidence for intermediate FMM+AFI stripe phase. |
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