期刊
PHYSICAL REVIEW B
卷 87, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.224107
关键词
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资金
- Academy of Finland [264961]
- GACR [P108/12/1941]
- Agence Nationale de la Recherche [ANR-11-BS10-016-02]
- ERA.Net [STP-133]
- Academy of Finland (AKA) [264961, 264961] Funding Source: Academy of Finland (AKA)
The use of high-performance perovskite-structure epitaxial relaxor ferroelectric films [S. H. Baek et al., Science 334, 958 (2011)] is hindered by the lack of knowledge of epitaxial effects therein. It is experimentally shown here that a biaxial epitaxial compression can favor the relaxor state over ferroelectricity. The absence of the ferroelectric transition and the existence of the low-temperature relaxor state are evidenced by a combination of x-ray diffraction, dielectric, polarization, and optical studies of PbSc0.5Nb0.5O3 films epitaxially grown on La0.5Sr0.5CoO3/MgO(001). This finding is beyond existing models of polarization in perovskite-structure epitaxial films and beyond the established ability to induce ferroelectricity by an epitaxial strain.
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