Magnetic Damping in Epitaxial Iron Alloyed with Vanadium and Aluminum
| Autor: | Tim Mewes, Abhishek Srivastava, Dwight D. Viehland, Zijian Jiang, Mantu K. Hudait, Michael Clavel, Claudia Mewes, David A. Smith, Arjun Sapkota, Youngmin Lim, Satoru Emori, Anish Rai, Jean J. Heremans, Timothy Q. Hartnett, Prasanna V. Balachandran |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
FOS: Physical sciences General Physics and Astronomy Vanadium chemistry.chemical_element 02 engineering and technology 01 natural sciences Condensed Matter::Materials Science symbols.namesake 0103 physical sciences 010306 general physics Condensed Matter - Materials Science Spintronics Condensed matter physics Fermi level Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Ferromagnetism chemistry Magnetic damping Content (measure theory) symbols Density of states Condensed Matter::Strongly Correlated Electrons Atomic number 0210 nano-technology |
| Zdroj: | Physical Review Applied. 14 |
| ISSN: | 2331-7019 |
| Popis: | To develop low-moment, low-damping metallic ferromagnets for power-efficient spintronic devices, it is crucial to understand how magnetic relaxation is impacted by the addition of nonmagnetic elements. Here, we compare magnetic relaxation in epitaxial Fe films alloyed with light nonmagnetic elements of V and Al. FeV alloys exhibit lower intrinsic damping compared to pure Fe, reduced by nearly a factor of 2, whereas damping in FeAl alloys increases with Al content. Our experimental and computational results indicate that reducing the density of states at the Fermi level, rather than the average atomic number, has a more significant impact in lowering damping in Fe alloyed with light elements. Moreover, FeV is confirmed to exhibit an intrinsic Gilbert damping parameter of $\simeq$0.001, among the lowest ever reported for ferromagnetic metals. 28 pages, 9 figures |
| Databáze: | OpenAIRE |
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