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A wide-frequency range dielectric tuning of BaTiO3 by embedding metal nanocrystals.


ABSTRACT: Fe nanocrystals (NCs) were embedded into the epitaxial BaTiO3 (BTO) matrix. According to optimized growth processes, a novel nanocomposite system was constructed, which consisted a well epitaxial BTO layer and three-dimensional Fe NCs. Based on this, the different dielectric response in the regions of low temperature-high frequency and low frequency-high temperature were revealed by the contribution of hopping and interfacial polarizations, respectively. With the increased amount of Fe NCs, the obvious enhancement in the low-frequency conductivity, middle frequency capacitance, and high-frequency inductive effect was found. The embedded metal NCs play an important role in tuning the dielectric behaviors and AC conductivity of oxide dielectrics. This significant rectification effect in wide-frequency ranges opens up a new direction for designing embedded nano-capacitors.

SUBMITTER: Xiong Z 

PROVIDER: S-EPMC8697803 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature

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A wide-frequency range dielectric tuning of BaTiO<sub>3</sub> by embedding metal nanocrystals.

Xiong Zhengwei Z   Liu Qian Q   Tang Jinlong J   Fang Leiming L   Zhang Xiaoqiang X   Li Jun J   Fu Yajun Y   Wang Jin J   Gao Zhipeng Z   Shi Deli D  

RSC advances 20210419 24


Fe nanocrystals (NCs) were embedded into the epitaxial BaTiO<sub>3</sub> (BTO) matrix. According to optimized growth processes, a novel nanocomposite system was constructed, which consisted a well epitaxial BTO layer and three-dimensional Fe NCs. Based on this, the different dielectric response in the regions of low temperature-high frequency and low frequency-high temperature were revealed by the contribution of hopping and interfacial polarizations, respectively. With the increased amount of F  ...[more]

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