Absence of ferromagnetic order in high quality bulk Co-doped ZnO samples.

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Autor(es): dc.creatorCarvalho, Hugo Bonette de-
Autor(es): dc.creatorGodoy, Marcio Peron Franco de-
Autor(es): dc.creatorPais, Rafael Witter Dias-
Autor(es): dc.creatorMir, Mirta-
Autor(es): dc.creatorZevallos, Ângela Maria Ortiz de-
Autor(es): dc.creatorIikawa, Fernando-
Autor(es): dc.creatorBrasil, Maria José Santos Pompeu-
Autor(es): dc.creatorChitta, Valmir Antônio-
Autor(es): dc.creatorFerraz, Wilmar Barbosa-
Autor(es): dc.creatorBoselli, Marco Aurélio-
Autor(es): dc.creatorSabioni, Antônio Claret Soares-
Data de aceite: dc.date.accessioned2019-11-06T13:24:21Z-
Data de disponibilização: dc.date.available2019-11-06T13:24:21Z-
Data de envio: dc.date.issued2012-07-13-
Data de envio: dc.date.issued2012-07-13-
Data de envio: dc.date.issued2010-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/123456789/1111-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/554697-
Descrição: dc.descriptionBulk Zn1−xCoxO samples were synthesized via standard solid-state reaction route with different Co molar concentrations up to 21%. A detailed microstructural analysis was carried out to investigate alternative sources of ferromagnetism, such as secondary phases and nanocrystals embedded in the bulk material. Conjugating different techniques we confirmed the Zn replacement by Co ions in the wurtzite ZnO structure, which retains, however, a high crystalline quality. No segregated secondary phases neither Co-rich nanocrystals were detected. Superconducting quantum interference device magnetometry demonstrates a paramagnetic Curie–Weiss behavior with antiferromagnetic interactions. We discuss the observed room temperature paramagnetism of our samples considering the current models for the magnetic properties of diluted magnetic semiconductors.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Journal of Applied Physicspermite o depósito da versão PDF do editor em Repositório Institucional. Fonte: Sherpa/Romeo <http://www.sherpa.ac.uk/romeo/search.php?issn=0021-8979> Acesso em 28 fev. 2014.-
Título: dc.titleAbsence of ferromagnetic order in high quality bulk Co-doped ZnO samples.-
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