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Intermediate-temperature sensors based on La0.5Ba0.5MnO3/nanoporous anodic aluminum oxide multilayered film thermistors

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Abstract

Perovskite La0.5Ba0.5MnO3 (LBMO) film thermistors for temperature monitoring over a wide range of intermediate temperatures (200–450 °C) were fabricated on thin Al-foil substrates with a nanoporous anodic aluminum oxide layer at the Al surface (AAO-Al). Al2O3 nanoflake arrays were additionally grown on the AAO-Al using a pore-sealing process. The LBMO films were fabricated at 400 °C using the photoreaction of nanoparticles method with KrF laser irradiation. The obtained LBMO films were well crystallized using a laser fluence of 30 mJ cm−2 and 500 pulses owing to the controlled photothermal heating effect. The multilayered LBMO/AAO-Al film thermistors exhibited an optimized thermistor constant of B = 2626 K over a wide range of temperatures (20–450 °C) and a very rapid response. The polycrystalline grains of the LBMO films were well integrated with the Al2O3 nanoflake arrays on the AAO-Al substrates, affording remarkably stable structural and thermistor properties of the LBMO/AAO-Al film thermistors during 1000 cycles of temperature cycling between room temperature and 400 °C.

Graphical abstract: Intermediate-temperature sensors based on La0.5Ba0.5MnO3/nanoporous anodic aluminum oxide multilayered film thermistors

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Publication details

The article was received on 19 Feb 2019, accepted on 07 Apr 2019 and first published on 12 Apr 2019


Article type: Paper
DOI: 10.1039/C9TC00961B
Citation: J. Mater. Chem. C, 2019, Advance Article

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    Intermediate-temperature sensors based on La0.5Ba0.5MnO3/nanoporous anodic aluminum oxide multilayered film thermistors

    T. Nakajima, S. Hanawa and T. Tsuchiya, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C9TC00961B

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