Structural characterization of MnNi and MnPt antiferromagnetic materials for spintronic applications

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

teixeira, j. m. (Autor) Outra; ventura, j. (Autor) REIT; araujo, j. p. (Autor) FCUP; sousa, j. b. (Autor) FCUP; amaral, v. s. (Autor) Outra; negulescu, b. (Autor) Outra; rickart, m. (Autor) Outra; freitas, p. p. (Autor) Outra

Revista

Título: Journal of Non-Crystalline Solids

Vol. 354 Nº 2585

Páginas: 5275-5278

ISSN: 0022-3093

Editora: Elsevier

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-003-TKA

DOI: 10.1016/j.jnoncrysol.2008.05.076

Abstract (EN): MnNi and MnPt become antiferromagnetic (AFM) when annealed at high enough temperatures, for which a face-centered cubic (fcc) to face-centered tetragonal (fcc) structural transition occurs. Thus, structural information is essential when optimizing exchange bias in these materials. We performed structural (Xray diffraction), magnetic (Magneto-Optical Kerr effect) and magneto-transport (magnetoresi stance) measurements on MnNi based spin valves subjected to different annealing procedures and MnPt/CoFe bilayers with different MnPt thicknesses. We show that high annealing temperatures can in fact lead to the fct anti ferromagnetic phase in both materials, but the annealing procedure is also an important factor on the obtained exchange field values. Also, MnPt/CoFe bilayers allowed us to probe the influence of average AFM-grain size on exchange bias.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4