Ultrafast acoustics for magnetization modulation (B06)

• Subject Area: Experimental Condensed Matter Physics
• Term: from 2015 to 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 249492093

Coherent phonons are an effective launcher of magnetization precession at the nanoscale by elastic modulation of the magnetocrystalline anisotropy of a ferromagnet. Here we will use ultrafast acoustics for coherent magneto-phonon interactions. We will extend the frequencies of magnon-phonon coupling effects such as spin-pumping in a Galfenol spin valve up to THz and excite specific magnon modes using vertical and lateral resonators, aiming at demonstrating phonon-magnon conversion. In ferromagnetic (Ga,Mn)(As,P) films we will realize a strain-induced reorientation of magnetization. We also plan to extend ultrafast magneto-acoustics to antiferromagnetic materials.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 160: Coherent manipulation of interacting spin excitations in tailored semiconductors
• International Connection: Russia
• Applicant Institution: Technische Universität Dortmund
• Co-Applicant Institution: Russian Academy of Sciences ; Ioffe Institute
• Project Heads: Professor Dr. Manfred Bayer; Professor Dr. Eugeniius Ivchenko; Alexey Scherbakov, Ph.D.