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Correlation between local structure and magnetic behavior in co-sputtered Tb_xFe_(73)Ga_(27-x) (7 ≤ x ≤11) thin films

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Muñoz Noval, Álvaro y Salas Colera, E. y Bartolomé Izquierdo, Pablo y Serrano, A. y Castro, G. R. y Ranchal Sánchez, Rocío (2017) Correlation between local structure and magnetic behavior in co-sputtered Tb_xFe_(73)Ga_(27-x) (7 ≤ x ≤11) thin films. Journal of alloys and compounds, 726 . pp. 352-357. ISSN 0925-8388

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URL Oficial: http://dx.doi.org/10.1016/j.jallcom.2017.07.271


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We report on the evolution of the microstructure of Tb-Fe-Ga films deposited by co-sputtering from Tb_(33)Fe_(67) and Fe_(72)Ga_(28) targets. The sputtering power was fixed (90 W) in the Fe_(72)Ga_(28) whereas it was increased from 50 to 90 W in the Tb_(33)Fe_(67) target resulting on Tb_xFe_(73)Ga_(27-x) layers with 7 ≤ x ≤ 11. The local structure was determined by means of x-ray absorption fine structure spectroscopy at Fe-K, Ga-K and Tb-L_(3) edges. The increase of Tb in the alloy promotes the phase segregation that produces a larger amount of the TbFe_2 structural phase. The structural results have been correlated with the magnetic characterization that shows the enhancement of the out-of-plane component of the magnetization.


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© Elsevier Science SA.
This work has been financially supported through projects MAT2015-66888-C3-3-R and PIE-2010-OE-013-200014 of the Spanish Ministry of Economy and Competitiveness (MINECO/FEDER) and through the project PR26/16- 3B-2 of Santander and Universidad Complutense de Madrid. We thank “Instituto de Sistemas Optoelectrónicos y Microtecnología” (ISOM) for using its facilities. We also want to thank ESRF and BM25-Spline, the Spanish CRG at ESRF, for providing beamtime.

Palabras clave:Sputtering; Iron alloys; x-ray Absorption fine structure; Magnetic properties
Materias:Ciencias > Física > Física de materiales
Ciencias > Física > Física del estado sólido
Código ID:45659
Depositado:04 Dic 2017 17:12
Última Modificación:05 Jul 2018 15:18

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