Strain-driven broken twin boundary coherence in YBa2Cu3O7−δ nanocomposite thin films

Guzman, R. ; Gazquez, J. ; Rouco, V. ; Palau, A. ; Magén, C. (Universidad de Zaragoza) ; Varela, M. ; Arbiol, J. ; Obradors, X. ; Puig, T.

Resumen: In this letter we use high resolution scanning transmission electron microscopy to study epitaxial YBa2Cu3O7-d (YBCO) nanocomposite thin films. We find that twin boundaries (TB) in YBCO nanocomposite thin films are disturbed by the presence of secondary phase nanoparticles as well as by intergrowths. Secondary phases promote the nucleation of TBs and, at the same time, result in bending, decreasing and changing the TB's spacing. On the other hand, the local strain ensuing from the partial dislocation associated to Y248 and Y125 intergrowths break the vertical coherence of TBs. This interaction results in a complex domain structure where twin boundary coherence is no longer satisfied and twin spacing is reduced down to a few nanometers precluding vortex channeling at low temperatures.

Idioma: Inglés

DOI: 10.1063/1.4793749

Año: 2013

Publicado en: APPLIED PHYSICS LETTERS 102 (2013), 081906 [5 pp]
ISSN: 0003-6951

Factor impacto JCR: 3.515 (2013)

Categ. JCR: PHYSICS, APPLIED rank: 20 / 135 = 0.148 (2013) - Q1 - T1

Financiación: info:eu-repo/grantAgreement/EUR/EUROTAPES/NMP3-LA-2012- 280432
Financiación: info:eu-repo/grantAgreement/ES/MICINN/CSD2007-00041-CONSOLIDER NANOSELECT
Financiación: info:eu-repo/grantAgreement/ES/MICINN/FPI
Financiación: info:eu-repo/grantAgreement/ES/MICINN/MAT2008-01022
Financiación: info:eu-repo/grantAgreement/ES/MICINN/MAT2011-28874-C02-01

Tipo y forma: Article (Published version)

Área (Departamento): Física de la Materia Condensada (Departamento de Física de la Materia Condensada)