Magnetic phases and structural properties in Co/Ru superlattices

Autor:	V. P. Nascimento, Fernando Pelegrini, Miguel Tafur, E. M. Baggio-Saitovitch, W. Alayo
Rok vydání:	2009
Předmět:	Magnetization Materials science Magnetic moment Ferromagnetism Magnetic circular dichroism X-ray crystallography Analytical chemistry General Physics and Astronomy Resonance Atmospheric temperature range Ferromagnetic resonance
Zdroj:	Journal of Applied Physics. 105:093905
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.3122021
Popis:	We report studies by x-ray diffraction, ferromagnetic resonance (FMR), and x-ray magnetic circular dichroism (XMCD) in Co/Ru superlattices grown by magnetron sputtering. We studied the [Co(50 A)/Ru(tRu)]20 samples, which were deposited at room temperature on Si substrates with the Ru thicknesses, tRu, varying between 9 and 33 A. The main and secondary uniform absorption modes, observed in the FMR spectra, are associated with the Co/Ru interfaces and the bulk Co regions, respectively. The main mode becomes more intense than the secondary one for increasing tRu. This is attributed to the roughness and/or atomic interdiffusion, which leads, with increasing tRu, to an increasing volume of Co/Ru interfacial regions and a decreasing volume of pure Co regions. The XMCD measurements provide Co spin magnetic moments lower than the bulk Co value, confirming the presence of a Co magnetic region with a lower local effective magnetization attributed to the Co/Ru interfaces.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2b114877834a19283afe0b3a39a02228 https://doi.org/10.1063/1.3122021 Zobrazit plný text záznamu