Bibliographic Details
| Summary: | In this work, the formation of the orthorhombic phase of ZrO2 together with the minor monoclinic phase were elucidated by X-ray diffraction and transmission electron microscopy. Moreover, oxidized W can be responsible for the formation of oxygen vacancies in the ZrO2 through oxygen scavenging. The ferroelectric properties of the W/ZrO2/W film capacitors were investigated through piezoresponse force microscopy (PFM) and polarization-voltage measurements. A second-order phase transition from the polar orthorhombic phase to the non-polar tetragonal phase was observed. Density functional theory calculations confirm our experimental results and propose that oxygen vacancies are responsible for the Curie–Weiss temperature of 130 °C, significantly lower than the theoretical value for the bulk. |
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| Main Authors: | Pereira, Rui M. P. |
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| Other Authors: | Istrate, Marian C.; Figueiras, Fábio G.; Lenzi, Veniero; Silva, Bruna M.; Benamara, Majdi; Romanyuk, Konstantin N.; Ghica, Corneliu; Almeida, B. G.; Marques, L.; Pereira, Mário; Silva, José Pedro Basto |
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| Subject: | Ferroelectricity Orthorhombic ZrO 2 Oxygen vacancies Phase transitions |
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| Year: | 2024 |
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| Country: | Portugal |
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| Document type: | article |
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| Access type: | restricted access |
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| Associated institution: | Universidade do Minho |
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| Language: | English |
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| Origin: | RepositóriUM - Universidade do Minho |
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