Magnetoelastic interactions and magnetic damping in Co
| Autor: | Artem Lynnyk, Takeshi Seki, Lech T. Baczewski, Bartlomiej Salski, Tae Yamamoto, Adam Nabiałek, H. Szymczak, H. Głowiński, Adam Pacewicz, Kensaku Takanashi, Jaroslaw Z. Domagala, O. M. Chumak |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Magnetoresistance Science 02 engineering and technology 01 natural sciences Article Condensed Matter::Materials Science Surfaces interfaces and thin films Magnetic properties and materials 0103 physical sciences Saturation (magnetic) 010302 applied physics Spin pumping Multidisciplinary Spin polarization Condensed matter physics Spintronics 021001 nanoscience & nanotechnology Ferromagnetic resonance Magnetic anisotropy Magnetic damping Medicine Condensed Matter::Strongly Correlated Electrons 0210 nano-technology |
| Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | Co2Fe0.4Mn0.6Si (CFMS) and Co2FeGa0.5Ge0.5 (CFGG) Heusler alloys are among the most promising thin film materials for spintronic devices due to a high spin polarization, low magnetic damping and giant/tunneling magnetoresistance ratios. Despite numerous investigations of Heusler alloys magnetic properties performed up to now, magnetoelastic effects in these materials remain not fully understood; due to quite rare studies of correlations between magnetoelastic and other magnetic properties, such as magnetic dissipation or magnetic anisotropy. In this research we have investigated epitaxial CFMS and CFGG Heusler alloys thin films of thickness in the range of 15–50 nm. We have determined the magnetoelastic tensor components and magnetic damping parameters as a function of the magnetic layer thickness. Magnetic damping measurements revealed the existence of non-Gilbert dissipation related contributions, including two-magnon scattering and spin pumping phenomena. Magnetoelastic constant B11 values and the effective magnetic damping parameter αeff values were found to be in the range of − 6 to 30 × 106 erg/cm3 and between 1 and 12 × 10–3, respectively. The values of saturation magnetostriction λS for CFMS Heusler alloy thin films were also obtained using the strain modulated ferromagnetic resonance technique. The correlation between αeff and B11, depending on magnetic layer thickness was determined based on the performed investigations of the above mentioned magnetic properties. |
| Databáze: | OpenAIRE |
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