Abstract
We report ultralow intrinsic magnetic damping in Co25Fe75 heterostructures, reaching the low 10-4 regime at room temperature. By using a broadband ferromagnetic resonance technique in out-of-plane geometry, we extracted the dynamic magnetic properties of several Co25Fe75-based heterostructures with varying ferromagnetic layer thicknesses. By measuring radiative damping and spin pumping effects, we found the intrinsic damping of a 26 nm thick sample to be α 0 3.18 × 10 - 4. Furthermore, using Brillouin light scattering microscopy, we measured spin-wave propagation lengths of up to (21 ± 1) μm in a 26 nm thick Co25Fe75 heterostructure at room temperature, which is in excellent agreement with the measured damping.
Originalsprache | Englisch |
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Aufsatznummer | 122402 |
Fachzeitschrift | Applied Physics Letters |
Jahrgang | 115 |
Ausgabenummer | 12 |
DOIs | |
Publikationsstatus | Veröffentlicht - 16 Sept. 2019 |