Laser-assisted three-dimensional atom probe analysis of dopant distribution in Gd-doped CeO2

Li, F.; Ohkubo, T.; Chen, Y.M.; Kodzuka, M.; Ye, Fan; Ou, Ding Rong; Mori, Toshiyuki; Hono, K.

doi:10.1016/j.scriptamat.2010.04.029

Cited by 46 publications

(31 citation statements)

References 24 publications

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“…20 Analogous phenomenon, the Gd enrichment at grain boundary in 25GDC, has been verified by laser-assisted three-dimensional atom probe recently. 21 Our recent detections also illustrate that rare-earth elements can diffuse and segregate at grain boundaries. 22 Similar observation that rare-earth element ͑La͒ is preferentially segregated at grain boundary has also been demonstrated in La/ Si 3 N 4 ceramics.…”

Section: -mentioning

confidence: 66%

Direct evidence of dopant segregation in Gd-doped ceria

Mori

Auchterlonie

et al. 2011

Applied Physics Letters

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Microstructures and segregations of dopants and associated oxygen vacancies in gadolinium-doped ceria (GDC) have been characterized by high-resolution transmission electron microscopy (HRTEM) and scanning TEM (STEM). Diffuse scattering was detected in 25 at. % GDC (25GDC) in comparison to 10GDC, which is ascribed to nanodomain formation in 25GDC. HRTEM, dark-field, and STEM Z-contrast imaging investigations all provide direct evidence for dopant segregation in doped ceria. It is illustrated that dopant cations cannot only segregate in grain interior forming larger nanodomains but also at grain boundary forming smaller ones. Detailed analyses about nanodomain formation and related dopant segregation behaviors are then elucidated.

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Section: -mentioning

confidence: 66%

Direct evidence of dopant segregation in Gd-doped ceria

Mori

Auchterlonie

et al. 2011

Applied Physics Letters

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“…Although Larson et al [14] reported the feasibility of insulator analyses using green laser, the work did not demonstrate reconstruction of 3D tomography of the nanostructure within the specimen. Recently, we reported that atomic resolution atom probe tomography can be obtained even from bulk insulating oxides by assisting field evaporation by UV laser [15,16]. In this paper, we report general features of UV laser assisted field evaporation that enabled quantitative atom probe tomography of insulting samples.…”

Section: Introductionmentioning

confidence: 90%

Broadening the applications of the atom probe technique by ultraviolet femtosecond laser

et al. 2011

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“…Therefore, CeO 2 is not as efficient as UO 2 in transferring electrons from the valence band to the conduction band. Li et al, [20,21] who previously investigated CeO 2 in atom probe, studied Y and Gd doped CeO 2 , which enhances the material's electrical conductivity and modifies its electronic structure by lowering its band gap energy as compared to pure CeO 2 , improving the electronic properties in UV range [44].…”

Section: Absorption Characteristicsmentioning

confidence: 99%

“…Recent UV laser-assisted APT results have been published on the evaporation behavior of bulk CeO 2 [20][21][22]. The results from Kirchhofer et al [22] indicate that the optimal evaporation behavior of CeO 2 for analysis with APT are obtained using a 1 pJ laser energy, specimen base temperature of 20 K, and a pulse repetition rate of 100 kHz.…”

Section: Introductionmentioning

confidence: 99%