PLD and RF-PLD synthesis of Ba<Subscript>0.6</Subscript>Sr<Subscript>0.4</Subscript>TiO<Subscript>3</Subscript> ferroelectric thin films for electrically controlled devices期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

PLD and RF-PLD synthesis of Ba0.6Sr0.4TiO3 ferroelectric thin films for electrically controlled devices

Authors:	L. Nedelcu A. Ioachim M. I. Toacsan M. G. Banciu I. Pasuk M. Buda N. Scarisoreanu V. Ion M. Dinescu

Affiliation:	(1) Advanced Materials for Special Applications, National Institute of Materials Physics, 105 bis Atomistilor Street, 077125 Bucharest-Magurele, Romania;(2) Optical Processing of Advanced Materials, National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Bucharest-Magurele, Romania

Abstract:	Ba_0.6Sr_0.4TiO₃ (BST) bulk ceramic synthesized by solid state reaction was used as target for thin films grown by pulsed laser deposition (PLD) and radiofrequency beam assisted PLD (RF-PLD). The X-ray diffraction patterns indicate that the films exhibit a polycrystalline cubic structure with a distorted unit cell. Scanning Electron Microscopy investigations showed a columnar microstructure with size of spherical grains up to 150 nm. The capacitance–voltage (C–V) characteristics of the BST films were performed by applying a DC voltage up to 5 V. A value of 280 for dielectric constant and 12.5% electrical tunability of the BST capacitor have been measured at room temperature.

Keywords:	KeywordHeading" >PACS 81.15.Fg 77.55.+f 84.37.+q
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