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Phase transitions and the temperature dependence of the dielectric properties in tetragonally strained barium strontium titanate films
被引:10
|作者:
Alldredge, L. M. B.
[1
]
Chang, Wontae
[1
]
Kirchoefer, Steven W.
[1
]
Pond, Jeffrey M.
[1
]
机构:
[1] USN, Res Lab, Washington, DC 20375 USA
关键词:
barium compounds;
dielectric thin films;
ferroelectric transitions;
magnesium compounds;
permittivity;
sputter deposition;
strontium compounds;
tensile strength;
FERROELECTRIC THIN-FILMS;
CONSTANT;
DIAGRAMS;
D O I:
10.1063/1.3079093
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
The dielectric properties of sputter-deposited Ba(1-x)Sr(x)TiO(3) (BST) thin films on (001) MgO substrates with in-plane or out-of-plane tetragonal lattice structure distortions were characterized as a function of temperature. A temperature-dependent interpolation calibration technique was developed for increased efficiency of the microwave measurements. The BST films showed significant differences in the ferroelectric phase transition due to lattice distortions with a strong temperature dependence of the in-plane dielectric behavior for films under tensile strain and a weak temperature dependence for films under compressive strain. The experimental data agreed well with theoretical modeling of the BST film strain effect based on Devonshire's theory.
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页数:3
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