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Inertial Spin Dynam...
Inertial Spin Dynamics in Epitaxial Cobalt Films
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- Unikandanunni, Vivek, 1993- (författare)
- Stockholms universitet,Fysikum
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Medapalli, Rajasekhar (författare)
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Asa, Marco (författare)
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Albisetti, Edoardo (författare)
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Petti, Daniela (författare)
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Bertacco, Riccardo (författare)
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Fullerton, Eric E. (författare)
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- Bonetti, Stefano (författare)
- Stockholms universitet,Fysikum,Ca’ Foscari University of Venice, Italy
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(creator_code:org_t)
- 2022
- 2022
- Engelska.
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 129:23
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We investigate the spin dynamics driven by terahertz magnetic fields in epitaxial thin films of cobalt in its three crystalline phases. The terahertz magnetic field generates a torque on the magnetization which causes it to precess for about 1 ps, with a subpicosecond temporal lag from the driving force. Then, the magnetization undergoes natural damped THz oscillations at a frequency characteristic of the crystalline phase. We describe the experimental observations solving the inertial Landau-Lifshitz-Gilbert equation. Using the results from the relativistic theory of magnetic inertia, we find that the angular momentum relaxation time η is the only material parameter needed to describe all the experimental evidence. Our experiments suggest a proportionality between η and the strength of the magnetocrystalline anisotropy.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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