Evidence of Gd substitution for Y in YBCO films with Gd excess

Reale, P.; Pinto, V.; Cayado Llosa, Pablo; Celentano, G.; Armenio, A. Angrisani; Rufoloni, A.; Santoni, A.; D’Acapito, F.

doi:10.1016/j.jallcom.2024.173921

Scientific article

English

Evidence of Gd substitution for Y in YBCO films with Gd excess

Contributors

Reale, P.; Pinto, V.; Cayado Llosa, Pablo

; Celentano, G.; Armenio, A. Angrisani; Rufoloni, A.; Santoni, A.; D’Acapito, F.

Published in

Journal of alloys and compounds, vol. 983, 173921

Publication date

2024-05-05

First online date

2024-02-20

Abstract

Gd-YBa₂Cu₃O_7-δ (Gd-YBCO) thin films with 10 mol% and 20 mol% excess-Gd concentration with respect to Y were investigated at the Gd L₃ and Y K core absorption edges by EXAFS spectroscopy with the aim of determining the local structure of the Gd dopant. To this purpose, EXAFS data were collected also on GdBa₂Cu₃O_7-δ (GdBCO) and pristine YBCO films and on Gd₂O₃ and Y₂O₃ model compounds for comparison with the YBCO films with Gd excess. The EXAFS analysis was based on Y and Gd oxides as well as on a cluster obtained by Density Functional Theory (DFT) where Gd atoms were inserted substitutional to Y atoms. The EXAFS data clearly reveal the incorporation of Gd in the lattice as substitute of Y and no evidence of segregated Gd oxide was found within the film matrix.

Keywords

EXAFS
Superconductors
Atomic scale structure
Computer simulations
Chemical synthesis
YBCO
GdBCO

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique de la matière quantique

Funding

European Commission - Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium [633053]
Consiglio Nazionale delle Ricerche - LISA [N. DFM.AD006.072]

Citation (ISO format)

REALE, P. et al. Evidence of Gd substitution for Y in YBCO films with Gd excess. In: Journal of alloys and compounds, 2024, vol. 983, p. 173921. doi: 10.1016/j.jallcom.2024.173921

Article (Published version)

CC BY-NC-ND-4.0

Identifiers

PID : unige:180507
DOI : 10.1016/j.jallcom.2024.173921

Additional URL for this publication

https://linkinghub.elsevier.com/retrieve/pii/S0925838824005085

Journal ISSN

0925-8388

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56downloads

Creation

02/10/2024 11:59:11

First validation

03/10/2024 13:24:25

Update

30/10/2024 10:33:18

Status update

30/10/2024 10:33:18

Last indexation

30/10/2024 10:34:11

Evidence of Gd substitution for Y in YBCO films with Gd excess

Contributors

Published in

Publication date

First online date

Abstract

Keywords

UNIGE affiliation entities

Funding

Citation (ISO format)

Main files (1)

Identifiers

Additional URL for this publication

Journal ISSN

Technical informations

Creation

First validation

Update

Status update

Last indexation