Defect-induced reversible ferromagnetism in hydrogenated ZnO:Co

Autor:	T. Shripathi, R.K. Singhal, Arvind Samariya, E. Baggio-Saitovitch, Uday Deshpande, Y.T. Xing, Sudhish Kumar
Rok vydání:	2010
Předmět:	Hydrogen annealing Materials science Hydrogen Condensed matter physics chemistry.chemical_element Electronic structure Magnetic semiconductor Condensed Matter Physics Oxygen Oxygen vacancy Electronic Optical and Magnetic Materials chemistry Ferromagnetism Physical chemistry Spectroscopy
Zdroj:	Journal of Magnetism and Magnetic Materials. 322:2187-2190
ISSN:	0304-8853
DOI:	10.1016/j.jmmm.2010.02.007
Popis:	Through simple hydrogen annealing treatment, we observed robust inducement of room temperature ferromagnetism (RTFM) in ZnO:Co (5%) pellets. The hydrogen mediated magnetic transition is accompanied by electronic structure plus bonding modifications with no structural deviations or creation of secondary phases, as evidenced by XRD and photoemission investigations. Our findings reveal a route correlation of oxygen vacancies with the observed RTFM. In particular, we systematically investigated the time controlled re-heating consequences on hydrogenated sample. The H-induced RTFM and subsequent modifications viz . electronic structure, transport properties and bonding effect gradually retrace back upon evaporating the hydrogen.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ee2a7d53d31e5ee3657a66e787ba33cd https://doi.org/10.1016/j.jmmm.2010.02.007 Zobrazit plný text záznamu Full Text from ScienceDirect