TY - JOUR
T1 - Revealing intrinsic electro-optic effect in single domain Pb(Zr, Ti)O3 thin films
AU - Kondo, Shinya
AU - Yamada, Tomoaki
AU - Yoshino, Masahito
AU - Teranishi, Takashi
AU - Kishimoto, Akira
AU - Nagasaki, Takanori
N1 - Funding Information:
This work was supported partly by the JSPS KAKENHI (Grant No. 19J12654) (S.K.), the Murata Science Foundation (T.Y.), the Foundation of Public Interest of Tatematsu (T.Y.), and MEXT Element Strategy Initiative to Form Core Research Center (Grant No. JPMXP0112101001) (T.Y.).
Publisher Copyright:
© 2021 Author(s).
PY - 2021/9/6
Y1 - 2021/9/6
N2 - We deposited polar-axis-oriented tetragonal and rhombohedral single domain Pb(Zr, Ti)O3 (PZT) films on CaF2(100) substrates by inserting SrRuO3 (SRO)/LaNiO3 and SRO/SrTiO3/TiO2/CeO2 buffer layers. Both PZT films grew epitaxially and had a (001)- and (111)-domain with the remnant polarization and piezoelectric constant comparable to the theoretical values of PZT single crystals having the same compositions. The electro-optic (EO) response of the fabricated PZT films was constant with respect to the DC electric field and increased linearly with an increasing AC electric field, thus representing a typical linear EO response in single domain ferroelectrics. The measured EO coefficients were larger than the value for a single crystal of PbTiO3, i.e., one of the end members of PZT, but smaller than the values reported for polycrystalline and epitaxial PZT films with multiple domains. These findings show that the intrinsic EO effect is enhanced in PZT, which is similar to the enhancement seen in the dielectric and piezoelectric constants. Moreover, most of the reported EO response in PZT films is supported by additional extrinsic contributions.
AB - We deposited polar-axis-oriented tetragonal and rhombohedral single domain Pb(Zr, Ti)O3 (PZT) films on CaF2(100) substrates by inserting SrRuO3 (SRO)/LaNiO3 and SRO/SrTiO3/TiO2/CeO2 buffer layers. Both PZT films grew epitaxially and had a (001)- and (111)-domain with the remnant polarization and piezoelectric constant comparable to the theoretical values of PZT single crystals having the same compositions. The electro-optic (EO) response of the fabricated PZT films was constant with respect to the DC electric field and increased linearly with an increasing AC electric field, thus representing a typical linear EO response in single domain ferroelectrics. The measured EO coefficients were larger than the value for a single crystal of PbTiO3, i.e., one of the end members of PZT, but smaller than the values reported for polycrystalline and epitaxial PZT films with multiple domains. These findings show that the intrinsic EO effect is enhanced in PZT, which is similar to the enhancement seen in the dielectric and piezoelectric constants. Moreover, most of the reported EO response in PZT films is supported by additional extrinsic contributions.
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U2 - 10.1063/5.0056121
DO - 10.1063/5.0056121
M3 - Article
AN - SCOPUS:85114740461
SN - 0003-6951
VL - 119
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 10
M1 - 102902
ER -