Ferroelectric and Structural Properties of Cobalt-Doped Lead Ferrite Thin Films Formed by Reactive Magnetron Sputtering

IF 2.4 4区材料科学 Q2 CRYSTALLOGRAPHY

Crystals Pub Date : 2024-08-12 DOI:10.3390/cryst14080721

Benas Beklešovas, Vytautas Stankus, Aleksandras Iljinas, Liutauras Marcinauskas

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Abstract

Cobalt-doped lead ferrite (Pb2Fe2O5) thin films were deposited by reactive magnetron sputtering. The influence of the cobalt concentration and synthesis temperature on the structure, phase composition and ferroelectric properties of Pb2Fe2O5 thin films was investigated. It was determined that the increase in deposition temperature increased the grain size and density of the Co-doped PFO thin films. The XRD data demonstrated that the Co-doped Pb2Fe2O5 thin films consisted of Pb2Fe2O5 and PbO phases with a low amount of CoO and Co3O4 phases. The increase in the cobalt concentration in the Pb2Fe2O5 films slightly enhanced the cobalt oxide phase content. Polarization dependence on electric field measurement demonstrated that the highest ferroelectric properties of the Co-doped Pb2Fe2O5 films were obtained when the synthesis was performed at 550 °C temperatures. The increase in the cobalt concentration in the films enhanced the remnant polarization and coercive field values. It was found that the Co-doped Pb2Fe2O5 film deposited at 550 °C temperature and containing 10% cobalt had the highest remnant polarization (72 µC/cm2) and coercive electric field (105 kV/cm).

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反应磁控溅射法形成的掺钴铅铁氧体薄膜的铁电性质和结构特性

采用反应磁控溅射法沉积了掺钴铅铁氧体（Pb2Fe2O5）薄膜。研究了钴浓度和合成温度对 Pb2Fe2O5 薄膜的结构、相组成和铁电特性的影响。结果表明，沉积温度的升高增加了掺钴 PFO 薄膜的晶粒尺寸和密度。XRD 数据表明，掺 Co 的 Pb2Fe2O5 薄膜由 Pb2Fe2O5 和 PbO 相组成，CoO 和 Co3O4 相含量较低。Pb2Fe2O5 薄膜中钴浓度的增加略微提高了氧化钴相的含量。电场测量的极化依赖性表明，在 550 °C 温度下合成的掺钴 Pb2Fe2O5 薄膜具有最高的铁电特性。薄膜中钴浓度的增加提高了残余极化值和矫顽力场值。研究发现，在 550 °C 温度下沉积的含 10%钴的掺钴 Pb2Fe2O5 薄膜具有最高的残余极化（72 µC/cm2）和矫顽力场（105 kV/cm）。

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来源期刊

Crystals CRYSTALLOGRAPHYMATERIALS SCIENCE, MULTIDIS-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

4.20

自引率

11.10%

发文量

1527

审稿时长

16.12 days

期刊介绍： Crystals (ISSN 2073-4352) is an open access journal that covers all aspects of crystalline material research. Crystals can act as a reference, and as a publication resource, to the community. It publishes reviews, regular research articles, and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on article length. Full experimental details must be provided to enable the results to be reproduced. Crystals provides a forum for the advancement of our understanding of the nucleation, growth, processing, and characterization of crystalline materials. Their mechanical, chemical, electronic, magnetic, and optical properties, and their diverse applications, are all considered to be of importance.