The effects of Co-Ti co-doping on the magnetic, electrical, and magnetodielectric behaviors of M-type barium hexaferrites

Magnetic, electrical and magnetodielectric properties have been studied in Co-Ti co-doped M-type hexaferrite BaCo{sub x}Ti{sub x}Fe{sub 12-2x}O{sub 19} (x = 0 ∼ 4). With the incorporation of Co-Ti, both their ferromagnetic magnetization and coercivity have been greatly changed. The temperature depen...

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Bibliographic Details
Published in:AIP advances 2013-12, Vol.3 (12)
Main Authors: Guan, Yujie, Lin, Yuanbin, Zou, Liangying, Miao, Qing, Zeng, Min, Gao, Xingsen, Liu, Zhongwu, Liu, Junming
Format: Article
Language:English
Subjects:
BARIUM
COERCIVE FORCE
DOPED MATERIALS
ELECTRICAL PROPERTIES
FERRITES
FERROELECTRIC MATERIALS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MATERIALS SCIENCE
POLARIZATION
TEMPERATURE DEPENDENCE
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Summary:Magnetic, electrical and magnetodielectric properties have been studied in Co-Ti co-doped M-type hexaferrite BaCo{sub x}Ti{sub x}Fe{sub 12-2x}O{sub 19} (x = 0 ∼ 4). With the incorporation of Co-Ti, both their ferromagnetic magnetization and coercivity have been greatly changed. The temperature dependent magnetization curve shows a apparent hump at around 420 K, likely in association with more complicated cycloidal spin ordering, which is closely related to ferroelectric polarization. Interestingly, a significantly enhancement in resistivity (∼3 orders in magnitude) can be obtained in co-doped samples (x > 2), which is beneficial for magnetoelectric properties. The magnetoelectric effect were examined by dielectric tunibility under external magnetic field, which shows apparent tunability up to ∼−3% for sample with x = 2 at 1T magnetic field, further supporting it is a room temperature single phase mutliferroic material.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4860948