首页|Fabrication of Dielectric/Conductive Hybrid Artificial Superlattices using Molecular Beam Epitaxy Method

Fabrication of Dielectric/Conductive Hybrid Artificial Superlattices using Molecular Beam Epitaxy Method

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  • NETL
  • NSTL
  • Trans Tech Publications Ltd
Artificial super-lattices of [(BaTiO_3)/(SrTiO_3)_(10)]_4(BTO_(10)/STO_(10)) were fabricated on STO(001) substrate by the molecular beam epitaxy method (MBE), and the molecular layers of SrRuO_3(SRO) was introduced into these superlattices as conductive layers. The superlattices introduced two conductive layers showed the enormous dielectric permittivity. On the other hand, the permittivity of the superlattice introduced one conductive layer was almost same as that of BTO_(10)/STO_(10). In the case of introducing two conductive layers, the moving electrons between two layers induced the interfacial polarization. Especially, the superlattice with two SRO conductive layers, the distance between these layers in a superlattice is 18 molecular layers, showed the highest relaxation frequency 132 kHz and biggest capacitance.

artificial superlatticesmolecular beam epitaxyinterfacial polarizationdielectric property

Yu Yonezawa、Hiroyuki Kinbara、Hiroki Umehara、Hirofumi Kakemoto、Takuya Hoshina、Hiroaki Takeda、Takaaki Tsurumi

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Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan

2010

10.4028/www.scientific.net/KEM.421-422.139

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.421/422
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