Abstract
The temperature dependence of the spin-pumping effect on the Gilbert damping in a bilayer based on epitaxial manganite film grown on neodymium galate substrate was investigated by measuring of the linewidth of the ferromagnetic resonance spectrum (FMR). Ferromagnetic resonance in thin ferromagnetic manganite La0.7Sr0.3MnO3 (LSMO) films is used to produce a spin current at the interface between a metallic and a ferromagnetic layer. Pt/LSMO/NGO, Au/LSMO/NGO and LSMO/NGO heterostrucutres were measured. An increase of the linewidth in FMR spectrum at the temperature lower liquid nitrogen temperature (77K) is observed .
Highlights
The operation of the most promising spintronics devices is based on a spin transport in magnetic heterostructures associated with the transfer of the spin moment when a spin-polarized current flows through them
A number of studies have been carried out on the excitation of a spin current by ferromagnetic resonance in two LSMO/NM layer structures (NM is a normal metal, usually platinum) [9,10], there is no data on the temperature dependence of the width of the ferromagnetic resonance spectrum (FMR) line in the presence of spin current in ferromagnets
The increase in the Gilbert damping parameter in a heterostructure from a ferromagnetic and a normal metal caused by precession of the magnetization in a ferromagnetic that causes the spin current to flow through the boundary into a normal metal was considered theoretically [13]
Summary
The operation of the most promising spintronics devices is based on a spin transport in magnetic heterostructures associated with the transfer of the spin moment when a spin-polarized current flows through them. A significant influence on the magnetic and electrical properties of the films is caused by the strain in the films caused by a mismatch with the substrate on which the manganite film [1,2,3] is deposited, as well as the effects of phase separation and the presence of a nonmagnetic layer at the substrate/film interface [4], which are the strongest Appear in very thin films (less than 10 nm). A number of studies have been carried out on the excitation of a spin current by ferromagnetic resonance in two LSMO/NM layer structures (NM is a normal metal, usually platinum) [9,10], there is no data on the temperature dependence of the width of the FMR line in the presence of spin current in ferromagnets
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