期刊
ACS APPLIED ELECTRONIC MATERIALS
卷 3, 期 8, 页码 3625-3632出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaelm.1c00528
关键词
ferroelectric; superdomain; PZT; pulsed laser deposition; scanning probe microscopy
资金
- Ministry of Science and Technology (MOST) in Taiwan [MOST 108-2112-M-005-008, MOST 109-2112-M-005011]
- MOST [MOST 108-2112-M-006-018-MY3, MOST 109-2636-M-006-003, MOST 107-2627-E-006-001]
- Higher Education Sprout Project, Ministry of Education
Thin film engineering allows researchers to modify physical properties, phase stability, and domain architectures in functional materials. This study reveals a naturally formed superdomain architecture in tetragonal Pb(Zr,Ti)O-3 epitaxial film, showing unique domain connections and piezoresponse characteristics.
Thin film engineering, utilizing proper control of crystalline orientation, strain, thickness, and defect density in thin films, has offered tremendous degrees of freedom for researchers to modify the physical properties, phase stability, and domain architectures in a wide spectrum of functional materials. This work unveils a naturally formed superdomain architecture arising from the low-orientation-symmetry-induced energetically degenerate state in a (101)-oriented tetragonal Pb(Zr,Ti)O-3 epitaxial film. Different from conventional (101)-oriented/(110)-oriented domains found in (101)-oriented tetragonal Pb(Zr,Ti)O-3 epitaxial heterostructures, these superdomains are composed of (101)-oriented domains with an alternative arrangement of opposite out-of-plane polarizations. Additionally, the conjunction between these superdomains has been found as another variant of the 90 degrees domain wall that can exist in the low-symmetric preferred crystallographic orientation. The superdomains simultaneously exhibit an atypical piezoresponse hysteresis loop with additional metastable states, corresponding to the multistate ferroelastic domain switching process. This work gives distinct insight into the correlation between the domain pattern, lattice symmetry, and polarity switching, offering an effective way for exploring and engineering ultrafine domain features in tetragonal ferroelectrics.
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