Universidad Complutense de Madrid
E-Prints Complutense

Initial stages of the growth of mixed iron-cobalt oxides on Ru(0001)

Impacto

Downloads

Downloads per month over past year

Martín García, Laura and Quesadab, Adrian and Pérez García, Lucas and Foerster, Michael and Aballe, Lucia and Figuera, Juan de la (2016) Initial stages of the growth of mixed iron-cobalt oxides on Ru(0001). Physics procedia, 85 . pp. 12-19. ISSN 1875-3892

[img]
Preview
PDF
Creative Commons Attribution Non-commercial No Derivatives.

8MB

Official URL: http://dx.doi.org/10.1016/j.phpro.2016.11.075


URLURL Type
http://www.sciencedirect.comPublisher


Abstract

Mixed iron-cobalt oxides have been grown on a Ru(0001) single crystal substrate by reactive molecular beam epitaxy. The growth has been followed by low-energy electron microscopy and diffraction. Chemical characterization has been performed by selected area x-ray absorption spectroscopy. As previously known, iron grows into a wetting layer of FeO. In contrast, cobalt grows into three-dimensional islands of CoO, of either with a (111) –most common-or a (100) orientation. For mixed compositions, flat 2D growth is regained. Depending on temperature, either segregation into two FeCo compositions or a single phase is detected. In all cases the structure corresponds to an in-plane expanded (111)-oriented halite one. When only one phase is observed or for the Co-rich phase in the two phase film, its crystal structure is rotated by 30. relative to the Ru substrate, unlike the Co-poor phase which appears aligned with the substrate.


Item Type:Article
Additional Information:

© 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
Conferencia: E-MRS Spring Meeting / Symposium CC on In Situ Studies of Functional Nano Materials at Large Scale Facilities - From Model Systems to Applications (2016. Lille, Francia).
This work is supported by the Spanish Ministry of Economy and Competitiveness through Projects No. MAT2015- 64110-C2-1-P, MAT2015-64110-C2-2-P and MAT2013-48009-C4-1-P. These experiments were performed at the CIRCE beamline of the ALBA Synchrotron Light Facility with the collaboration of ALBA staff.

Uncontrolled Keywords:Cobalt monoxide; iron monoxide; Reactive molecular beam epitaxy; Low-energy electron microscopy; Selected area x-ray absorption; Photoemission electron microscopy
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:42744
Deposited On:25 May 2017 17:39
Last Modified:06 Jun 2017 07:25

Origin of downloads

Repository Staff Only: item control page