Fabrication of Nb nanopin electrodes and their influence on multiferroic properties of BiFeO3 thin films

Yoonho Ahn; Jong Yeog Son

doi:10.1016/j.mseb.2020.114717

Fabrication of Nb nanopin electrodes and their influence on multiferroic properties of BiFeO₃ thin films

Yoonho Ahn
, Jong Yeog Son

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We report enhanced multiferroic properties of BiFeO₃ (BFO) thin films by depositing them on Nb nanopin bottom electrodes via spin-coating. The well-aligned Nb nanopin array was prepared from wet etching of an anodic aluminum oxide (AAO) nanotemplate. X-ray diffraction (XRD) measurement revealed that the BFO thin films were polycrystalline. The BFO thin films fabricated on Nb nanopin electrodes exhibited improved ferroelectricity with a remnant polarization (P_r) of 37.5 μC/cm² and a coercive electric field (E_c) of 98 kV/cm, which was better than those (P_r ~ 32.9 μC/cm² and E_c ~ 217 kV/cm) on the Nb film electrodes. We investigated leakage current, polarization switching speed as well as ferromagnetism, which also exhibited the improvement of BFO thin films on Nb nanopin electrodes. Significantly, we suggest that an enhanced electric field and surface-volume ratio of the Nb nanopin electrodes contribute to enhancement of the multiferroic properties of the BFO thin films.

Original language	English
Article number	114717
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	262
DOIs	https://doi.org/10.1016/j.mseb.2020.114717
Publication status	Published - Dec 2020

Bibliographical note

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

Anodic aluminum oxide nanotemplate
BiFeO thin film
Multiferroic property
Nb nanopin electrode
Piezoresponse force microscopy

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10.1016/j.mseb.2020.114717

Cite this

@article{f2c831118e6e4ee5b1f71d83bf6b6ec0,

title = "Fabrication of Nb nanopin electrodes and their influence on multiferroic properties of BiFeO3 thin films",

abstract = "We report enhanced multiferroic properties of BiFeO3 (BFO) thin films by depositing them on Nb nanopin bottom electrodes via spin-coating. The well-aligned Nb nanopin array was prepared from wet etching of an anodic aluminum oxide (AAO) nanotemplate. X-ray diffraction (XRD) measurement revealed that the BFO thin films were polycrystalline. The BFO thin films fabricated on Nb nanopin electrodes exhibited improved ferroelectricity with a remnant polarization (Pr) of 37.5 μC/cm2 and a coercive electric field (Ec) of 98 kV/cm, which was better than those (Pr \textasciitilde{} 32.9 μC/cm2 and Ec \textasciitilde{} 217 kV/cm) on the Nb film electrodes. We investigated leakage current, polarization switching speed as well as ferromagnetism, which also exhibited the improvement of BFO thin films on Nb nanopin electrodes. Significantly, we suggest that an enhanced electric field and surface-volume ratio of the Nb nanopin electrodes contribute to enhancement of the multiferroic properties of the BFO thin films.",

keywords = "Anodic aluminum oxide nanotemplate, BiFeO thin film, Multiferroic property, Nb nanopin electrode, Piezoresponse force microscopy",

author = "Yoonho Ahn and Son, \{Jong Yeog\}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = dec,

doi = "10.1016/j.mseb.2020.114717",

language = "English",

volume = "262",

journal = "Materials Science and Engineering B: Solid-State Materials for Advanced Technology",

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T1 - Fabrication of Nb nanopin electrodes and their influence on multiferroic properties of BiFeO3 thin films

AU - Ahn, Yoonho

AU - Son, Jong Yeog

PY - 2020/12

Y1 - 2020/12

N2 - We report enhanced multiferroic properties of BiFeO3 (BFO) thin films by depositing them on Nb nanopin bottom electrodes via spin-coating. The well-aligned Nb nanopin array was prepared from wet etching of an anodic aluminum oxide (AAO) nanotemplate. X-ray diffraction (XRD) measurement revealed that the BFO thin films were polycrystalline. The BFO thin films fabricated on Nb nanopin electrodes exhibited improved ferroelectricity with a remnant polarization (Pr) of 37.5 μC/cm2 and a coercive electric field (Ec) of 98 kV/cm, which was better than those (Pr ~ 32.9 μC/cm2 and Ec ~ 217 kV/cm) on the Nb film electrodes. We investigated leakage current, polarization switching speed as well as ferromagnetism, which also exhibited the improvement of BFO thin films on Nb nanopin electrodes. Significantly, we suggest that an enhanced electric field and surface-volume ratio of the Nb nanopin electrodes contribute to enhancement of the multiferroic properties of the BFO thin films.

AB - We report enhanced multiferroic properties of BiFeO3 (BFO) thin films by depositing them on Nb nanopin bottom electrodes via spin-coating. The well-aligned Nb nanopin array was prepared from wet etching of an anodic aluminum oxide (AAO) nanotemplate. X-ray diffraction (XRD) measurement revealed that the BFO thin films were polycrystalline. The BFO thin films fabricated on Nb nanopin electrodes exhibited improved ferroelectricity with a remnant polarization (Pr) of 37.5 μC/cm2 and a coercive electric field (Ec) of 98 kV/cm, which was better than those (Pr ~ 32.9 μC/cm2 and Ec ~ 217 kV/cm) on the Nb film electrodes. We investigated leakage current, polarization switching speed as well as ferromagnetism, which also exhibited the improvement of BFO thin films on Nb nanopin electrodes. Significantly, we suggest that an enhanced electric field and surface-volume ratio of the Nb nanopin electrodes contribute to enhancement of the multiferroic properties of the BFO thin films.

KW - Anodic aluminum oxide nanotemplate

KW - BiFeO thin film

KW - Multiferroic property

KW - Nb nanopin electrode

KW - Piezoresponse force microscopy

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DO - 10.1016/j.mseb.2020.114717

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JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

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