Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles

Room temperature ferromagnetism (RTF) is observed in pure copper oxide (CuO) nanoparticles which were prepared by precipitation method with the post-annealing in air without any ferromagnetic dopant. X-ray photoelectron spectroscopy (XPS) result indicates that the mixture valence states of Cu(1+) an...

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Autores principales: Gao, Daqiang, Zhang, Jing, Zhu, Jingyi, Qi, Jing, Zhang, Zhaohui, Sui, Wenbo, Shi, Huigang, Xue, Desheng
Formato: Texto
Lenguaje:English
Publicado: Springer 2010
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2893440/
https://www.ncbi.nlm.nih.gov/pubmed/20671775
http://dx.doi.org/10.1007/s11671-010-9555-8
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author Gao, Daqiang
Zhang, Jing
Zhu, Jingyi
Qi, Jing
Zhang, Zhaohui
Sui, Wenbo
Shi, Huigang
Xue, Desheng
author_facet Gao, Daqiang
Zhang, Jing
Zhu, Jingyi
Qi, Jing
Zhang, Zhaohui
Sui, Wenbo
Shi, Huigang
Xue, Desheng
author_sort Gao, Daqiang
collection PubMed
description Room temperature ferromagnetism (RTF) is observed in pure copper oxide (CuO) nanoparticles which were prepared by precipitation method with the post-annealing in air without any ferromagnetic dopant. X-ray photoelectron spectroscopy (XPS) result indicates that the mixture valence states of Cu(1+) and Cu(2+) ions exist at the surface of the particles. Vacuum annealing enhances the ferromagnetism (FM) of CuO nanoparticles, while oxygen atmosphere annealing reduces it. The origin of FM is suggested to the oxygen vacancies at the surface/or interface of the particles. Such a ferromagnet without the presence of any transition metal could be a very good option for a class of spintronics.
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spelling pubmed-28934402010-07-28 Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles Gao, Daqiang Zhang, Jing Zhu, Jingyi Qi, Jing Zhang, Zhaohui Sui, Wenbo Shi, Huigang Xue, Desheng Nanoscale Res Lett Nano Express Room temperature ferromagnetism (RTF) is observed in pure copper oxide (CuO) nanoparticles which were prepared by precipitation method with the post-annealing in air without any ferromagnetic dopant. X-ray photoelectron spectroscopy (XPS) result indicates that the mixture valence states of Cu(1+) and Cu(2+) ions exist at the surface of the particles. Vacuum annealing enhances the ferromagnetism (FM) of CuO nanoparticles, while oxygen atmosphere annealing reduces it. The origin of FM is suggested to the oxygen vacancies at the surface/or interface of the particles. Such a ferromagnet without the presence of any transition metal could be a very good option for a class of spintronics. Springer 2010-02-16 /pmc/articles/PMC2893440/ /pubmed/20671775 http://dx.doi.org/10.1007/s11671-010-9555-8 Text en Copyright © 2010 The Author(s) https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
spellingShingle Nano Express
Gao, Daqiang
Zhang, Jing
Zhu, Jingyi
Qi, Jing
Zhang, Zhaohui
Sui, Wenbo
Shi, Huigang
Xue, Desheng
Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles
title Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles
title_full Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles
title_fullStr Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles
title_full_unstemmed Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles
title_short Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles
title_sort vacancy-mediated magnetism in pure copper oxide nanoparticles
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2893440/
https://www.ncbi.nlm.nih.gov/pubmed/20671775
http://dx.doi.org/10.1007/s11671-010-9555-8
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