期刊
SOLID STATE COMMUNICATIONS
卷 150, 期 7-8, 页码 341-345出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2009.11.030
关键词
Magnetic oxide; Cluster glass; Magnetocaloric effect; Magnetic susceptibility
资金
- DOE [DE-FG02-07ER46438]
DC magnetization and AC susceptibility measurements on LuFe2O4 single crystals reveal a ferrimagnetic transition at 240 K followed by additional magnetic transitions at 225 K and 170 K, separating cluster glass phases, and a kinetically arrested state below 55 K. The origin of giant magnetic coercivity is attributed to the collective freezing of ferrimagnetic clusters and enhanced domain wall pinning associated with a structural transition at 170 K. Magnetocaloric effect measurements provide additional vital information about the multiple magnetic transitions and the glassy states. Our results lead to the emergence of a complex magnetic phase diagram in LuFe2O4. (C) 2009 Elsevier Ltd. All rights reserved.
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