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Welcome to the home page of Magsim – Group of Magnetic Simulations.

The group is working  in the Material Science Institue of Madrid (Spain), Spanish National Research Council (CSIC). Our scientific interests  currently include multiscale modelling (ab-initio, atomistic and micromagnetic) of magnetic materials.

Our main research lines:

1. Modelling of hysteresis and dynamics in nanostructured magnetic elements.

2. Modelling of ultra-fast laser-induced magnetisation dynamics.

3. Modelling of magnetic nanoparticles.

4. Multiscale modelling of magnetic materials.

 

Nature Communication article

Ultra-fast heat as sufficient stimulus for magnetisation reversal in a ferrimagnet

  doi:10.1038/ncomms 1666 (2012)

The question of how and how fast magnetization can be reversed is a topic of great practical interest for the manipulation and storage of magnetic information. It is generally accepted that magnetization reversal should be driven by a stimulus represented by time non-invariant vectors such as a magnetic field, spin polarized electric current, or cross-product of two oscillating electric fields. However, until now it has been generally assumed that heating alone, not represented as a vector at all, cannot result in a deterministic reversal of magnetization, although it may assist this process. In our recent article we show numerically and demonstrate experimentally a novel mechanism of deterministic magnetization reversal in a ferrimagnet driven by an ultrafast heating of the medium resulting from the absorption of a sub-picosecond, laser pulse without the presence of a magnetic field.

For more details, see our recent article