Journal
SOLID STATE COMMUNICATIONS
Volume 152, Issue 13, Pages 1112-1115Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2012.04.010
Keywords
Rare-earth ferrite; Temperature-induced magnetization reversal; Ultra-fast magnetization switch; First-principles calculations
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Funding
- Brain Korea 21 project
- World Class University (WCU) program through the National Research Foundation (NRF)
- Ministry of Education, Science and Technology of Korea [R31-2008-000-10059-0]
- KISTI Super-computing Center of Korea [KSC-2011-C3-16]
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We have found that SmFeO3, a family of rare-earth orthoferrites, exhibits temperature-induced magnetization reversal below the critical low-temperature along the a-axis of Pbnm symmetry. First-principles calculations demonstrate that this negative magnetization is mainly attributed to the competition between two magnetocrystalline anisotropy terms in the inequivalent magnetic sites of Sm3+ and Fe3+. Interestingly, the room temperature magnetization-field curve further shows an ultrafast magnetization switch in the low-magnetic field, suggesting a potential applicability to high-speed magnetic switching devices. (C) 2012 Elsevier Ltd. All rights reserved.
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