Interlayer spin coherence in antiferromagnetic EuTe/PbTe superlattices observed by polarized neutron diffraction |
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| Institution: | 1. National Institute of Standards of Technology, Gaithersburg, MD, 20899, U.S.A.;2. Institut für Halbleiterphysik, J. Kepler Universität Linz, Linz, A-4040, Austria;3. Department of Physics, Oregon State University, Corvallis, OR, 97331, U.S.A.;1. Plasma Nanoscience Laboratories, Manufacturing Flagship, CSIRO, P. O. Box 218, Lindfield, NSW 2070, Australia;2. School of Physics, University of Melbourne, Parkville, VIC 3010, Australia;3. School of Physics, The University of Sydney, Sydney, NSW 2006, Australia;4. Institute for Future Environments and School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia;1. Jo?ef Stefan Institute, Jamova cesta 39, SI-100 Ljubljana, Slovenia;2. Jo?ef Stefan International Postgraduate School, Jamova cesta 39, SI-100 Ljubljana, Slovenia;3. Institute of Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany;1. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;2. National Institute of Metrology, Beijing, 100029, China;1. Faculty of Engineering Sciences, GIK Institute of Engineering Sciences and Technology, Topi, Khyber Pakhtunkhwa, 23640 Pakistan;2. Department of Bioscience & Biotechnology, Sejong University, Seoul, 143-747 Republic of Korea;3. Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, Lahore, Pakistan;4. Centre for Advanced Studies in Physics, Government College University, Lahore 54000, Pakistan;5. Physics & Astronomy Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;1. Solid-State Physics Department, National Research Centre, El Buhouth St., 12622, Dokki, Cairo, Egypt;2. Electron Microscopy and Thin Film Department, National Research Centre, El Buhouth St., 12622, Dokki, Cairo, Egypt;3. Physics Department, Faculty of Science, Menoufia University, Egypt |
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| Abstract: | Neutron diffraction experiments on short-period EuTe/PbTe superlattices with a 111] growth axis reveal distinct magnetic correlations between the EuTe layers across up to 55 Â of non-magnetic PbTe spacers, even though EuTe is antiferromagnetic and there are not enough carriers to support RKKY interactions. With increasing in-plane external magnetic field we observe a decrease of the antiferromagnetic interlayer interactions. This decrease depends very strongly on whether the superlattices are cooled down through the Néel point in zero or non-zero field. |
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