Morphology of the asymmetric iron-silicon interfaces

被引：6

作者：

Badia-Romano, L. ^{[1
,2
]}

Rubin, J. ^{[1
,3
]}

Bartolome, F. ^{[1
,2
]}

Magen, C. ^{[2
,4
,5
]}

Bartolome, J. ^{[1
,2
]}

Varnakov, S. N. ^{[6
,7
]}

Ovchinnikov, S. G. ^{[6
,7
]}

Rubio-Zuazo, J. ^{[8
,9
]}

Castro, G. R. ^{[8
,9
]}

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[2] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[3] Univ Zaragoza, Dept Ciencia Mat & Ingn Met, E-50018 Zaragoza, Spain

[4] Univ Zaragoza, INA, LMA, E-50018 Zaragoza, Spain

[5] Fdn ARAID, E-50004 Zaragoza, Spain

[6] Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia

[7] Siberian Aerosp Univ, Krasnoyarsk 660014, Russia

[8] ESRF, SpLine Spanish CRG, F-38043 Grenoble, France

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

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 627卷

基金：

奥地利科学基金会;

关键词：

Fe/Si nanolayers; Interfaces; Fe silicides; Compositional depth; HAXPES; CEMS; AUGER-ELECTRON-SPECTROSCOPY; MEAN ESCAPE DEPTH; X-RAY; PHOTOELECTRON-SPECTROSCOPY; MAGNETIC-PROPERTIES; INFORMATION DEPTH; ROOM-TEMPERATURE; CROSS-SECTIONS; FE; FILMS;

D O I：

10.1016/j.jallcom.2014.12.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A systematic study of the iron-silicon interfaces formed upon preparation of (Fe/Si) multilayers has been performed by combination of modern and powerful techniques. Samples were prepared by thermal evaporation under ultrahigh vacuum onto a Si(100) substrate. The morphology of these films and their interfaces was studied by a combination of scanning transmission electron microscopy, X-ray reflectivity, angle resolved X-ray photoelectron spectroscopy and hard X-ray photoelectron spectroscopy. The Si-on-Fe interface thickness and roughness were determined to be 1.4(1) nm and 0.6(1) nm, respectively. Moreover, determination of the stable phases formed at both Fe-on-Si and Si-on-Fe interfaces was performed using conversion electron Mossbauer spectroscopy on multilayers with well separated Si-on-Fe and Fe-on-Si interfaces. It is shown that while a fraction of Fe remains as alpha-Fe, the rest has reacted with Si, forming the paramagnetic c-Fe1-xSi phase and a ferromagnetic Fe rich silicide (DO3 type phase). We conclude that the paramagnetic c-Fe1-xSi silicide sublayer is identical in both Si-on-Fe and Fe-on-Si interfaces, whereas an asymmetry is revealed in the composition of the ferromagnetic silicide sublayer. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：136 / 145

页数：10