Ultrafast thermally induced magnetic switching in synthetic ferrimagnets

Journal Article · Mon Feb 24 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4867015· OSTI ID:22293114

Evans, Richard F. L.,; Ostler, Thomas A.; Chantrell, Roy W. ^[1]; Radu, Ilie ^[2]; Rasing, Theo ^[3]

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1. Department of Physics, University of York, Heslington, York YO10 5DD (United Kingdom)
2. Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489 Berlin (Germany)
3. Radboud University, Institute for Molecules and Materials, Heyendaalsewg 135, 6525 AJ Nijmegen (Netherlands)

Synthetic ferrimagnets are composite magnetic structures formed from two or more anti-ferromagnetically coupled magnetic sublattices with different magnetic moments. Here, we report on atomistic spin simulations of the laser-induced magnetization dynamics on such synthetic ferrimagnets and demonstrate that the application of ultrashort laser pulses leads to sub-picosecond magnetization dynamics and all-optical switching in a similar manner as in ferrimagnetic alloys. Moreover, we present the essential material properties for successful laser-induced switching, demonstrating the feasibility of using a synthetic ferrimagnet as a high density magnetic storage element without the need of a write field.

• OSTI ID: 22293114
• Journal Information: Applied Physics Letters, Vol. 104, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
DENSITY
ELECTROMAGNETIC PULSES
FERRIMAGNETIC MATERIALS
LASERS
MAGNETIC MOMENTS
MAGNETIZATION
SIMULATION
SPIN