Tailoring the electric and magnetic properties of Ba0.8Sr0.2TiO3 ceramics by unsaturated Fe-doping

A special unsaturated Fe-doping method is applied to ferroelectric Ba 0.8 Sr 0.2 TiO 3 ceramics. With the help of X-ray diffraction, Raman spectra, and electrical measurements, we recognize that paraelectric cubic phase and ferroelectric tetragonal phase coexist in the doped ceramics Ba 0.8 Sr 0.2 T...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2020-06, Vol.31 (12), p.9860-9869
Main Authors: Wang, Junjun, Lu, Xiaomei, Gong, Baolian, Shao, Ye, Lei, Lin, Liu, Lin, Yan, Shuo, Huang, Fengzhen, Zhu, Jinsong
Format: Article
Language:English
Subjects:
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Dipoles
Doping
Electrical measurement
Ferroelectric materials
Ferroelectricity
Ferromagnetism
Low temperature
Magnetic properties
Magnetism
Materials Science
Optical and Electronic Materials
Raman spectra
Room temperature
Spin glasses
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A special unsaturated Fe-doping method is applied to ferroelectric Ba 0.8 Sr 0.2 TiO 3 ceramics. With the help of X-ray diffraction, Raman spectra, and electrical measurements, we recognize that paraelectric cubic phase and ferroelectric tetragonal phase coexist in the doped ceramics Ba 0.8 Sr 0.2 Ti 0.9 Fe 0.1 O 3 , Ba 0.8 Sr 0.18 Ti 0.9 Fe 0.1 O 3− δ and Ba 0.8 Sr 0.18 Ti 0.92 Fe 0.1 O 3− δ with Fe mainly occupy Ti sites. Meanwhile, obvious room temperature ferromagnetism and magnetodielectric effect present, attributed to the substitution of Fe ions (with variable valence) for both Ti and Sr. In addition, there appears dipole glass and spin glass at low-temperature. As more Fe ions enter into Sr sites, ferroelectricity, ferromagnetism and magnetodielectric effect increase slightly, which is related to the increase of dipoles formed between oxygen vacancies and low-valent Fe ions off-center at Sr sites, as well as the enhancement of ferromagnetic interaction between non-equivalent Fe ions. This work manifests the uncommonly used unsaturated Fe-doping as an effective method for tailoring the electric and magnetic properties and realizing magnetoelectric coupling in traditional ferroelectrics.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-020-03530-4