Dielectric and magnetoelectric characterization of CoFe2O 4/Ba0.55Sr0.25Ca0.2Nb 2O6 composites

Y. H. Tang; X. M. Chen; Y. J. Li; X. H. Zheng

doi:10.1016/j.mseb.2004.09.026

Dielectric and magnetoelectric characterization of CoFe₂O ₄/Ba_0.55Sr_0.25Ca_0.2Nb ₂O₆ composites

Y. H. Tang
, X. M. Chen
, Y. J. Li
, X. H. Zheng

School of Electrical Engineering

Zhejiang University

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

(1 - x)CoFe₂O₄/xBa_0.55Sr _0.25Ca_0.2Nb₂O₆ magnetoelectric (ME) composites were prepared and characterized. Co-presence of two endmembers was confirmed by SEM and X-ray diffraction analysis. A very high dielectric constant was obtained at low frequencies and an interesting temperature dependence of dielectric constant was observed in the present composite ceramics. All composites after postdensification annealing in oxygen could be electrically and magnetically poled to exhibit significant magnetoelectric effect. The ME effect of the composites was greatly dependent on the frequency of ac magnetic field. With increasing frequency, the magnetoelectric coefficient dE/dH increased firstly and then decreased. dE/dH also depended on the dc bias magnetic field. The highest dE/dH value of 9.51 mV/cm/Oe was observed in 0.2CoFe ₂O₄/0.8Ba_0..55Sr_0.25Ca _0.2Nb₂O₆ composites under 1 kOe and at 90kHz.

Original language	English
Pages (from-to)	150-155
Number of pages	6
Journal	Materials Science and Engineering: B
Volume	116
Issue number	2
DOIs	https://doi.org/10.1016/j.mseb.2004.09.026
State	Published - 25 Jan 2005

Keywords

Composite
Dielectric properties
Magnetoelectric
Magnetostrictive
Piezoelectric

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10.1016/j.mseb.2004.09.026

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@article{79e966c6e02c43628924c977f11b8a6b,

title = "Dielectric and magnetoelectric characterization of CoFe2O 4/Ba0.55Sr0.25Ca0.2Nb 2O6 composites",

abstract = "(1 - x)CoFe2O4/xBa0.55Sr 0.25Ca0.2Nb2O6 magnetoelectric (ME) composites were prepared and characterized. Co-presence of two endmembers was confirmed by SEM and X-ray diffraction analysis. A very high dielectric constant was obtained at low frequencies and an interesting temperature dependence of dielectric constant was observed in the present composite ceramics. All composites after postdensification annealing in oxygen could be electrically and magnetically poled to exhibit significant magnetoelectric effect. The ME effect of the composites was greatly dependent on the frequency of ac magnetic field. With increasing frequency, the magnetoelectric coefficient dE/dH increased firstly and then decreased. dE/dH also depended on the dc bias magnetic field. The highest dE/dH value of 9.51 mV/cm/Oe was observed in 0.2CoFe 2O4/0.8Ba0..55Sr0.25Ca 0.2Nb2O6 composites under 1 kOe and at 90kHz.",

keywords = "Composite, Dielectric properties, Magnetoelectric, Magnetostrictive, Piezoelectric",

author = "Tang, \{Y. H.\} and Chen, \{X. M.\} and Li, \{Y. J.\} and Zheng, \{X. H.\}",

year = "2005",

month = jan,

day = "25",

doi = "10.1016/j.mseb.2004.09.026",

language = "英语",

volume = "116",

pages = "150--155",

journal = "Materials Science and Engineering: B",

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TY - JOUR

T1 - Dielectric and magnetoelectric characterization of CoFe2O 4/Ba0.55Sr0.25Ca0.2Nb 2O6 composites

AU - Tang, Y. H.

AU - Chen, X. M.

AU - Li, Y. J.

AU - Zheng, X. H.

PY - 2005/1/25

Y1 - 2005/1/25

N2 - (1 - x)CoFe2O4/xBa0.55Sr 0.25Ca0.2Nb2O6 magnetoelectric (ME) composites were prepared and characterized. Co-presence of two endmembers was confirmed by SEM and X-ray diffraction analysis. A very high dielectric constant was obtained at low frequencies and an interesting temperature dependence of dielectric constant was observed in the present composite ceramics. All composites after postdensification annealing in oxygen could be electrically and magnetically poled to exhibit significant magnetoelectric effect. The ME effect of the composites was greatly dependent on the frequency of ac magnetic field. With increasing frequency, the magnetoelectric coefficient dE/dH increased firstly and then decreased. dE/dH also depended on the dc bias magnetic field. The highest dE/dH value of 9.51 mV/cm/Oe was observed in 0.2CoFe 2O4/0.8Ba0..55Sr0.25Ca 0.2Nb2O6 composites under 1 kOe and at 90kHz.

AB - (1 - x)CoFe2O4/xBa0.55Sr 0.25Ca0.2Nb2O6 magnetoelectric (ME) composites were prepared and characterized. Co-presence of two endmembers was confirmed by SEM and X-ray diffraction analysis. A very high dielectric constant was obtained at low frequencies and an interesting temperature dependence of dielectric constant was observed in the present composite ceramics. All composites after postdensification annealing in oxygen could be electrically and magnetically poled to exhibit significant magnetoelectric effect. The ME effect of the composites was greatly dependent on the frequency of ac magnetic field. With increasing frequency, the magnetoelectric coefficient dE/dH increased firstly and then decreased. dE/dH also depended on the dc bias magnetic field. The highest dE/dH value of 9.51 mV/cm/Oe was observed in 0.2CoFe 2O4/0.8Ba0..55Sr0.25Ca 0.2Nb2O6 composites under 1 kOe and at 90kHz.

KW - Composite

KW - Dielectric properties

KW - Magnetoelectric

KW - Magnetostrictive

KW - Piezoelectric

UR - https://www.scopus.com/pages/publications/84863011551

U2 - 10.1016/j.mseb.2004.09.026

DO - 10.1016/j.mseb.2004.09.026

M3 - 文章

AN - SCOPUS:84863011551

SN - 0921-5107

VL - 116

SP - 150

EP - 155

JO - Materials Science and Engineering: B

JF - Materials Science and Engineering: B

IS - 2

ER -

Dielectric and magnetoelectric characterization of CoFe₂O ₄/Ba_0.55Sr_0.25Ca_0.2Nb ₂O₆ composites

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Keywords

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