Strain-Tuned Magnetic Anisotropy in Sputtered Thulium Iron Garnet Ultrathin Films and TIG/Au/TIG Valve Structures
arXiv:2002.10608 · doi:10.1063/1.5135012
Abstract
Defining the magnetic anisotropy for in-plane or out-of-plane easy axis in ferrimagnetic insulators films by controlling the strain, while maintaining high-quality surfaces, is desirable for spintronic and magnonic applications. We investigate ways to tune the anisotropy of amorphous sputtered ultrathin thulium iron garnet (TIG) films, and thus tailor their magnetic properties by the thickness (7.5 to 60 nm), substrate choice (GGG and SGGG), and crystallization process. We correlate morphological and structural properties with the magnetic anisotropy of post-growth annealed films. 30 nm thick films annealed at 600 °C show compressive strain favoring an in-plane magnetic anisotropy (IPMA), whereas films annealed above 800 °C are under a tensile strain leading to a perpendicular magnetic anisotropy (PMA). Air-annealed films present a high degree of crystallinity and magnetization saturation close to the bulk value. These results lead to successful fabrication of trilayers TIG/Au/TIG, with coupling between the TIG layers depending on Au thickness. These results will facilitate the use of TIG to create various in situ clean hybrid structures for fundamental interface exchange studies, and towards the development of complex devices. Moreover, the sputtering technique is advantageous as it can be easily scaled up for industrial applications.
arXiv commentThe following article has been accepted by Journal of Applied Physics
References in corpus (18)
- Topological Field Theory of Time-Reversal Invariant Insulators
- Spin Hall Magnetoresistance Induced by a Non-Equilibrium Proximity Effect
- Temperature dependence of spin diffusion length and spin Hall angle in Au and Pt
- Theory of Spin Hall conductivity in n-doped GaAs
- Spin-Hall Magnetoresistance in Platinum on Yttrium Iron Garnet: Dependence on platinum thickness and in-plane/out-of-plane magnetization
- Ultra-low damping insulating magnetic thin films get perpendicular
- Above 400 K Robust Perpendicular Ferromagnetic Phase in a Topological Insulator
- Electronic control of the spin-wave damping in a magnetic insulator
- Magnon Valve Effect Between Two Magnetic Insulators
- Spin Hall Effect in Doped Semiconductor Structures
- Strain-Tunable Magnetocrystalline Anisotropy in Epitaxial Y3Fe5O12 Thin Films
- Anomalous Hall hysteresis in Tm3Fe5O12/Pt with strain-induced perpendicular magnetic anisotropy
- The Final Chapter In The Saga Of YIG
- Current heating induced spin Seebeck effect
- Anomalous Hall effect in YIGPt bilayers
- Magnon Valves Based on YIG/NiO/YIG All-Insulating Magnon Junctions
- Systematic Control of Strain-Induced Perpendicular Magnetic Anisotropy in Epitaxial Europium and Terbium Iron Garnets Thin Films
- Thermally-driven spin torques in layered magnetic insulators