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dc.contributor.authorWu, Jiangtaozh_CN
dc.contributor.authorMao, Shaoyuzh_CN
dc.contributor.authorYe, Zuo-Guangzh_CN
dc.contributor.authorXie, Zhaoxiongzh_CN
dc.contributor.author谢兆雄zh_CN
dc.contributor.authorZheng, Lansunzh_CN
dc.contributor.author郑兰荪zh_CN
dc.date.accessioned2011-04-26T08:03:15Z
dc.date.available2011-04-26T08:03:15Z
dc.date.issued2010-05zh_CN
dc.identifier.citationACS Appl. Mater. Interfaces, 2010, 2 (6): 1561–1564zh_CN
dc.identifier.issn1944-8244zh_CN
dc.identifier.urihttp://dx.doi.org/doi:10.1021/am1002052zh_CN
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/2120
dc.description.abstractUnusual room-temperature weak ferromagnetism alpha-Fe2O3 was prepared by heating the mixture of commercial alpha-Fe2O3 (as raw material) and tartaric acid at a mild temperature of 250 degrees C. This reaction involves a Fast heating and cooling process resulting from the self-catalyzed oxidation of tartaric acid. Careful chemical analyses confirmed that no any ferromagnetic impurities, such as Fe. Fe3O4, amorphous iron oxide and gamma-Fe2O3, were present in the treated sample. The unusual weak ferromagnetism was then attributed to the formation of a large amount of point defects in the treated sample during the peculiar synthetic process. Such a mechanism is supported by the result of annealing, which reduces the amount of point defects and thereby reestablishes the original antiferromagnetism in alpha-Fe2O3.zh_CN
dc.description.sponsorshipNatural Science and Engineering Research Council of Canada (NSERC) ; National Natural Science Foundation of China [20725310, 20673085]; National Basic Research Program of China [2007CB815303]zh_CN
dc.language.isoenzh_CN
dc.publisherAMER CHEMICAL SOCzh_CN
dc.subjecthematitezh_CN
dc.subjectcatalyzed oxidationzh_CN
dc.subjectferromagnetismzh_CN
dc.subjectpoint defectzh_CN
dc.titleRoom-Temperature Weak Ferromagnetism Induced by Point Defects in alpha-Fe2O3zh_CN
dc.typeArticlezh_CN


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