Exchange coupling of bilayers and synthetic antiferromagnets pinned to MnPt

• Tipo: Artigo em Revista Científica Internacional
• Data: 2005

Autores

Rickart, M (Autor) Outra; Guedes, A (Autor) Outra; Negulescu, B (Autor) Outra; ventura, j. (Autor) Outra; sousa, j. b. (Autor) FCUP; Diaz, P (Autor) Outra; MacKenzie, M (Autor) Outra; Chapman, JN (Autor) Outra; Freitas, PP (Autor) Outra

Revista

Título: European Physical Journal B

Vol. 45

Páginas: 207-212

ISSN: 1434-6028

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 14 Citações

Scopus - 16 Citações

Outras Informações

ID Authenticus: P-000-3HV

DOI: 10.1140/epjb/e2005-00051-5

Abstract (EN): Exchange bias and blocking temperature were studied in MnPt based bottom-pinned bilayers and synthetic antiferromagnets (SAF) prepared by magnetron sputtering. The structure and magnetic properties were determined as a function of the MnPt layer thickness. Exchange coupling was found to be (J(ex) = 0.4 erg/cm(2)) for a MnPt ( t <= 20 nm)/ CoFe (5 nm) bilayer. The distribution of the blocking temperature T-B was analyzed and its width Delta T-B and center point T-B,T-center determined. T-B is about 280 degrees C for thinner MnPt films, and increases to 330 degrees C for thick films. Delta T-B is constant for thick MnPt but steadily increases as the thickness decreases. SAF structures show higher exchange bias and higher T-B,T-center at thin layer thickness (t(MnPt) = 8.5 nm) compared to bilayers.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6