Journal
APPLIED PHYSICS EXPRESS
Volume 7, Issue 11, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/APEX.7.113002
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Funding
- Japan Society for the Promotion of Science (JSPS) through the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)
- Ministry of Education, Culture, Sports, Science and Technology, Japan [23244071, 23681032]
- Council for Science and Technology Policy (CSTP)
- Grants-in-Aid for Scientific Research [23681032, 23244071] Funding Source: KAKEN
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Critical behavior near ferromagnetic transition in EuS and Gd-doped EuS films was studied by magnetization measurement and cryogenic Lorentz microscopy. Ferromagnetic s-f interaction was strongly enhanced by doping 2% Gd. The Curie temperature and critical exponents of the magnetic phase transition for Gd-doped EuS were determined to be 86.3 +/- 0.2 K, beta = 0.43 +/- 0.01, and gamma = 1.20 +/- 0.05 from the scaling plot, while those for EuS were 14.6 +/- 0.1 K, beta = 0.39 +/- 0.01, and gamma = 1.20 +/- 0.05. The different universality classes of these materials showed different magnetic domain structures near the Curie temperature: the long-range ferromagnetic ordering based on the mean field model causes the formation of a large domain. (C) 2014 The Japan Society of Applied Physics.
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