TY - JOUR
T1 - Orthorhombic-like atomic arrangement in hafnium-oxide-based nanoparticles
AU - Fujimoto, Konomi
AU - Sato, Yukio
AU - Fuchikami, Yoshifumi
AU - Teranishi, Ryo
AU - Kaneko, Kenji
N1 - Funding Information:
This work was supported by JSPS KAKENHI (grant numbers: JP18K18952, JP20K21091, JP20H00314, and JP20H02441), by a JSPS‐DST bilateral joint research project (grant number: JPJSBP120197724), and by the Murata Science foundation (grant number: M20‐044). We would like to thank Edanz ( https://jp.edanz.com/ac ) for editing a draft of this manuscript.
Publisher Copyright:
© 2021 The American Ceramic Society
PY - 2021
Y1 - 2021
N2 - Size effect on ferroelectricity in nanoparticles (NPs) has been an important issue for decades. For NPs with a perovskite-type crystal structure, which are the most popular ferroelectrics, ferroelectricity is believed to disappear for sizes below a critical value. However, newly discovered hafnium-oxide-based systems exhibit stronger ferroelectricity for thinner films that may be advantageous to produce smaller ferroelectric NPs, and the ferroelectricity is believed to originate from a polar orthorhombic phase. In the present study, zirconium-doped hafnium oxide NPs with diameters of ∼3−4 nm were synthesized and then were clarified to be of a metastable phase with an orthorhombic-like local atomic arrangement. This study implies that ferroelectricity may possibly be obtained in hafnium-oxide-based NPs.
AB - Size effect on ferroelectricity in nanoparticles (NPs) has been an important issue for decades. For NPs with a perovskite-type crystal structure, which are the most popular ferroelectrics, ferroelectricity is believed to disappear for sizes below a critical value. However, newly discovered hafnium-oxide-based systems exhibit stronger ferroelectricity for thinner films that may be advantageous to produce smaller ferroelectric NPs, and the ferroelectricity is believed to originate from a polar orthorhombic phase. In the present study, zirconium-doped hafnium oxide NPs with diameters of ∼3−4 nm were synthesized and then were clarified to be of a metastable phase with an orthorhombic-like local atomic arrangement. This study implies that ferroelectricity may possibly be obtained in hafnium-oxide-based NPs.
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U2 - 10.1111/jace.18242
DO - 10.1111/jace.18242
M3 - Article
AN - SCOPUS:85120302464
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
ER -