Issue 14, 2020

Origin and control of room temperature ferromagnetism in Co,Zn-doped SnO2: oxygen vacancies and their local environment

Abstract

We combine quantitative X-ray spectroscopy and crystal field calculations to study Co and Zn co-doped SnO2 diluted magnetic semiconductor systems, report the location of vacancies, and the new effect of vacancy transfer resulting in optical luminescence only present after annealing. We connect this phenomenon to mid gap states using the band structure of the material obtained via density functional theory. Furthermore, we give a new understanding of the interaction of transition metals within co-doped systems. Finally, we present new evidence that the ferromagnetism is mediated by the oxygen vacancies and the particular local environment of the vacancies can be controlled via the synthesis conditions.

Graphical abstract: Origin and control of room temperature ferromagnetism in Co,Zn-doped SnO2: oxygen vacancies and their local environment

Supplementary files

Article information

Article type
Paper
Submitted
13 Dec 2019
Accepted
03 Mar 2020
First published
05 Mar 2020

J. Mater. Chem. C, 2020,8, 4902-4908

Author version available

Origin and control of room temperature ferromagnetism in Co,Zn-doped SnO2: oxygen vacancies and their local environment

J. Ho, T. de Boer, P. M. Braun, B. Leedahl, D. Manikandan, R. Murugan and A. Moewes, J. Mater. Chem. C, 2020, 8, 4902 DOI: 10.1039/C9TC06830A

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