Article
Microstructural and magnetic characterization of Fe- and Ir-based multilayers
Author/s | Arias Egido, E.
Laguna Marco, M.A. Sánchez Marcos, J. Piquer, C. Chaboy, J. Ávila, M. García López, Francisco Javier |
Department | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Publication Date | 2018 |
Deposit Date | 2020-05-19 |
Published in |
|
Abstract | Nominal [Fe(t)/Ir(t′)]n (M/M type), [FeOx(t)/IrOx(t′)]n (O/O), and [Fe(t)/IrOx(t′)]n (M/O) multilayers have been prepared by magnetron sputtering at room temperature. Composition, structure, and magnetic behavior have been ... Nominal [Fe(t)/Ir(t′)]n (M/M type), [FeOx(t)/IrOx(t′)]n (O/O), and [Fe(t)/IrOx(t′)]n (M/O) multilayers have been prepared by magnetron sputtering at room temperature. Composition, structure, and magnetic behavior have been analyzed. In the M/M samples, the Fe and Ir phases are identified as bcc and fcc, respectively. The magnetism evolves from bulklike iron to granular behavior as the thickness of the Fe layers decreases. An induced magnetic moment, ferromagnetically coupled to Fe, is observed on Ir by x-ray magnetic circular dichroism (XMCD). Besides, the presence of negative remanent magnetization is observed in the M/M samples. As for the M/O samples, the stronger affinity of iron for oxygen displaces the oxygen atoms giving rise to actual heterostructures that strongly differ from the nominal ones. For similar thickness of the two layers the Fe layer become oxidized while a mixture of metal and oxide phases is found in the Ir layer. The increase of the Fe thickness leads to a metallic Ir layer and a highly coercive (∼4.4 kOe) core-shell metal-oxide structure in the Fe layers. |
Funding agencies | Ministerio de Economía y Competitividad (MINECO). España |
Project ID. | MAT2014-54425-R
MAT2017-83468-R |
Citation | Arias Egido, E., Laguna Marco, M.A., Sánchez Marcos, J., Piquer, C., Chaboy, J., Ávila, M. y García López, F.J. (2018). Microstructural and magnetic characterization of Fe- and Ir-based multilayers. Physical Review Materials, 2 (1), 014402-1-014402-10. |
Files | Size | Format | View | Description |
---|---|---|---|---|
Microstructural and magnetic .pdf | 1.544Mb | [PDF] | View/ | |