Finite-temperature magnetism of thin Ni films in sandwiches of Cu |
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| Institution: | 1. Department of Physics, Graduate School of Engineering, Yokohama National University, Yokohama, 240-8501, Japan;2. Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;3. National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan;4. New Industry Creation Hatchery Center, Tohoku University, 6-6-4 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan;5. Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia;1. Kazan Branch of Joint Supercomputer Center, Scientific Research Institute of System Analysis, the Russian Academy of Sciences, Lobachevsky st. 2/31, 420111 Kazan, Russian Federation;2. Department of Mathematics, University of Georgia, Athens, GA, 30605, USA;3. Craft & Hawkins Department of Petroleum Engineering Louisiana State University, Baton Rouge, LA 70803, USA;1. Instituto de Ciências Exatas, Universidade Federal Fluminense, 27213-145, Volta Redonda, RJ, Brazil;2. Programa de Pós Graduação em Física, Instituto de Física, Universidade Federal Fluminense, 24210-346, Niterói, RJ, Brazil;1. Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, USA;2. Auburn University Physics Department, 206 Allison Laboratory, Auburn University, Auburn, AL 36849, USA;1. Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, Guilin University of Electronic Technology, Guilin 541004, People’s Republic of China;2. Academy of Marine Information Technology, Guilin University of Electronic Technology, Beihai 536000, People’s Republic of China |
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| Abstract: | The finite-temperature magnetism of thin Ni films sandwiched in Cu(001) layers, is discussed with the use of the itinerant-electron theory including the effect of spin fluctuations by means of the functional-integral method within the static and single-site approximations. The spatial- and temperature-dependent magnetization and the Curie temperature are computed by varying the Ni-film thickness from one to ten layers. The calculated results are discussed with reference to the recent experiments on Cu/Ni/Cu and Au/Ni/Au sandwiches and on compositionally modulated Ni-Cu superlattices. |
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