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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 and Salas Colera, E. and Bartolomé Izquierdo, Pablo and Serrano, A. and Castro, G. R. and 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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Official URL: http://dx.doi.org/10.1016/j.jallcom.2017.07.271


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Abstract

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.

Uncontrolled Keywords:Sputtering; Iron alloys; x-ray Absorption fine structure; Magnetic properties
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:45659
Deposited On:04 Dec 2017 17:12
Last Modified:05 Jul 2018 15:18

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