Correlation between local structure and magnetic behavior in co-sputtered TbxFe73Ga27-x (7 ≤ x ≤ 11) thin films

JOURNAL OF ALLOYS AND COMPOUNDS

卷:726

Article

Munoz-Noval, A.¹  Salas-Colera, E.^2,3  Bartolome, P.⁴  Serrano, A.^2,3  Castro, G. R.^2,3  Ranchal, R.⁴ 

[1] Hiroshima Univ, Dept Appl Chem, Higashihiroshima, Hiroshima 7398527, Japan

[2] ESRF, Spanish CRG, Spline BM25, Grenoble, France

[3] CSIC, Inst Ciencia Mat Madrid, Madrid, Spain

[4] Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Mat, Ciudad Univ S-N, E-28040 Madrid, Spain

关键词: Sputtering;    Iron alloys;    X-ray absorption fine structure;    Magnetic properties;   

DOI  :  10.1016/j.jallcom.2017.07.271

来源: Elsevier

【 摘 要 】

We report on the evolution of the microstructure of Tb-Fe-Ga films deposited by co-sputtering from Tb33Fe67 and Fe72Ga28 targets. The sputtering power was fixed (90 W) in the Fe72Ga28 whereas it was increased from 50 to 90 W in the Tb33Fe67 target resulting on TbxFe73Ga27-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 TbFe2 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. (C) 2017 Elsevier B.V. All rights reserved.

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