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Preparation, Dielectric, and Magnetic Characteristics of LuFe 2 O 4 Ceramics
Author(s) -
Qin Ying,
Liu Xiao Qiang,
Wu Yong Jun,
Chen Xiang Ming
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12348
Subject(s) - dielectric , ferrimagnetism , materials science , activation energy , relaxation (psychology) , ceramic , phase transition , analytical chemistry (journal) , mineralogy , chemistry , condensed matter physics , magnetic field , magnetization , composite material , physics , psychology , social psychology , optoelectronics , chromatography , quantum mechanics
Preparation of LuFe 2 O 4 ceramics under vacuum environment was investigated together with the structural, dielectric, and magnetic characterization. Single‐phase LuFe 2 O 4 could be obtained by the present process and the crystal structure was identified to be rhombohedral in space group < b > R3 ¯ m < / b > . An obvious dielectric relaxation with activation energy of 0.29 eV was observed between 175 and 275 K. The Néel temperature of the present ceramics was ~250 K, and a reentrant spin glass transition was indicated at ~216 K. Two anomalies were observed in the DSC curve, which were relative with the ferrimagnetic transition and 2D–3D charge ordering transition of LuFe 2 O 4 . Meanwhile, a remarkable decrease appeared in the dielectric constant of the as‐magnetized LuFe 2 O 4 sample, implying the magnetodielectric effect in the present ceramics.