Growth of superconducting NdFe0.88Co0.12AsO films by metal-organic chemical vapor deposition and post arsenic diffusion

I. Corrales-Mendoza; P. Bartolo-Pèrez; V. M. Sánchez-Reséndiz; S. Gallardo-Hernández; A. Conde-Gallardo

doi:10.1209/0295-5075/109/17007

All issues

Volume 109 / No 1 (January 2015)

EPL, 109 1 (2015) 17007

Abstract

Issue		EPL Volume 109, Number 1, January 2015


Article Number		17007
Number of page(s)		5
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/109/17007
Published online		22 January 2015

EPL, 109 (2015) 17007

Growth of superconducting NdFe_0.88Co_0.12AsO films by metal-organic chemical vapor deposition and post arsenic diffusion

I. Corrales-Mendoza¹, P. Bartolo-Pèrez², V. M. Sánchez-Reséndiz³, S. Gallardo-Hernández³ and A. Conde-Gallardo¹^(a)

¹ Departamento de Física, CINVESTAV-IPN - Apdo. Postal 14-740, México D.F. 07360, México
² CINVESTAV-IPN, Unidad Mérida, Departamento de Física Aplicada - Apdo. Postal Cordemex. 97310, Mérida, Yuc., México
³ Departamento de Ingeniería Eléctrica, CINVESTAV-IPN - Apdo. Postal 14-740, México D.F. 07360, México

^(a) aconde@fis.cinvestav.mx

Received: 18 October 2014
Accepted: 18 December 2014

Abstract

Metal-organic chemical vapor deposition (MOCVD) and post-deposition arsenic diffusion processes were successfully employed to grow superconducting NdFe_0.88Co_0.12AsO thin films. First, by employing iron, cobalt and neodymium metal-organic precursors, a precursor film is grown by MOCVD on (001)-oriented LaAlO₃ substrates. Subsequently, the arsenic is incorporated during an annealing of these precursor films in the presence of a NdFe_0.9Co_0.1AsO pellet. The chemical composition and crystallographic results indicate the formation of the cobalt-doped NdFeAsO polycrystalline phase. The secondary ion mass spectroscopy indicates a homogeneous arsenic diffusion process. The resistance and magnetization measurements as a function of temperature indicate a superconducting transition ${\sim}15\ \text{K}$ .

PACS: 74.78.-w – Superconducting films and low-dimensional structures / 74.70.Xa – Pnictides and chalcogenides / 81.15.Gh – Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.)

© EPLA, 2015

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