[7p-P03-1~47] 10 Spintronics and Magnetics (Poster)

English Presentation

[7p-P03-23] Structural analysis and damping evaluation of epitaxially grown L1₀-FePt thin films

〇Yuta Sasaki¹, Phillip Bentley¹, Katsuaki Nakazawa¹, Takanobu Hiroto¹, Shinji Isogami¹, Hirofumi Suto¹, Yukiko Takahashi¹ (1.NIMS)

Keywords:

metal thin film,L10-FePt,magnetization dynamics

L1₀-FePt has attracted significant interest as a magnetic recording material owing to its large perpendicular magnetic anisotropy (PMA), large saturation magnetization, and chemical stability. Its large magnetoresistance and high spin injection efficiency make it a promising candidate for spintronic applications with operation frequencies above 100 GHz. However, despite these promising magnetic properties, the relatively large magnetic damping constant of L1₀-FePt thin films is not suitable for spintronic device applications. In this study, we investigated the magnetization dynamics of L1₀-FePt thin films grown on different substrates, MgO, MgAl₂O₄ (MAO) and SrTiO₃ (STO). We demonstrated that the modification of the microstructure in FePt is crucial for achieving a lower damping constant and realizing novel FePt spintronic devices.