Coherent phonon control via electron-lattice interaction in ferromagnetic Co/Pt multilayers
SCIE
SCOPUS
- Title
- Coherent phonon control via electron-lattice interaction in ferromagnetic Co/Pt multilayers
- Authors
- Kim, CH; Shim, JH; Lee, KM; Jeong, JR; Kim, DH; Kim, DE
- Date Issued
- 2016-03-01
- Publisher
- Nature Publishing Group
- Abstract
- The manipulation of coherent phonons in condensed systems has attracted fundamental interest, particularly for its applications to future devices. We demonstrate that a coherent phonon in Co/Pt nano-multilayer can be quantitatively controlled via electron-lattice coupling, specifically by changing the multilayer repeat number. To that end, systematic measurement of the time-resolved reflectivity and magneto-optical Kerr effect in Co/Pt multilayers was performed. The coherent phonon frequency was observed to be shifted with the change of the multilayer repeat number. This shift could be clearly explained based on the two-temperature model. Detailed analysis indicated that the lattice heat capacity and electron-lattice coupling strength are linearly dependent on the repeat number of the periodic multilayer structures. Accessing the control of coherent phonons using nanostructures opens a new avenue for advanced phonon-engineering applications.
- Keywords
- STRAINED-LAYER SUPERLATTICES; THIN-FILMS; DYNAMICS; FREQUENCY; MAGNETIZATION; ANISOTROPY
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29903
- DOI
- 10.1038/SREP22054
- ISSN
- 2045-2322
- Article Type
- Article
- Citation
- SCIENTIFIC REPORTS, vol. 6, 2016-03-01
- Files in This Item:
-
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.