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Giant M-E effect of multiferroic BaTiO/sub 3/--LaMnO/sub 3/ ceramic composites

K. BánDepartment of Materials Science and Engineering, Nagoya Institute of Technology, JapanM. GomiDepartment of Materials Science and Engineering, Nagoya Institute of Technology, JapanTakeshi ShundoDepartment of Materials Science and Engineering, Nagoya Institute of Technology, JapanNaoya NishimuraDepartment of Materials Science and Engineering, Nagoya Institute of Technology, Japan

2005en

ABI

Annotatsiya

The magnetic and dielectric properties of ceramic composites, in which 10 mol% antiferromagnetic LaMnO/sub 3/ was added to ferroelectric BaTiO/sub 3/, have been investigated. X-ray diffraction measurement showed that ceramics sintered in the range of 1050-1150/spl deg/C are composites containing a small amount of (La, Ba)MnO/sub 3/ phase along with BaTiO/sub 3/ phase. These composites were found to be multiferroic materials simultaneously exhibiting ferromagnetic and ferroelectric properties at room temperature. When an electric field of 2.3 kV/mm was applied to the composite sintered at 1200/spl deg/C, a reduction of spontaneous magnetization as large as 70% was observed at room temperature. This reduction may be ascribed to the decrease of electron transfer interaction of the precipitated ferromagnetic (La, Ba)MnO/sub 3/ caused by electrostriction of the surrounding BaTiO/sub 3/ matrix.

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Identifikatorlar

DOI: 10.1109/tmag.2005.854773

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