Formation of artificial BaTiO3/SrTiO3 superlattices using pulsed laser deposition and their dielectric properties

Applied Physics Letters - Tập 65 Số 15 - Trang 1970-1972 - 1994
Hitoshi Tabata1, Hidekazu Tanaka1, Tomoji Kawai1
1The Institute of Scientific and Industrial Research, Osaka University, 8-1, Mihogaoka, Ibaraki, Osaka 567, Japan

Tóm tắt

We have formed strained dielectric superlattices of BaTiO3 (BTO) and SrTiO3 (STO) by a pulsed laser deposition technique. A large strain of 400–500 MPa is introduced at the interface between the BTO and STO layers. A large dielectric constant of 900 was observed with a stacking periodicity of 2 unit cells/2 unit cells. The superlattices show drastically different electrical behavior from that of the solid solution (Sr,Ba)TiO3 films. Broad maxima of the dielectric constants occur around 40–50 °C and the values remain large even for a temperature above 200 °C.

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Thông tin xuất bản

Applied Physics Letters

Tập 65 Số 15

1970-1972

Thông tin tác giả