Volume 104, Number 4, November 2013
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||10 December 2013|
Atomistic simulations of magnetic amorphous solids: Magnetostriction, Barkhausen noise and novel singularities
1 Department of Chemical Physics, The Weizmann Institute of Science - Rehovot 76100, Israel
2 Department of Physics, Emory University - Atlanta, GA 30322, USA
Received: 29 September 2013
Accepted: 6 November 2013
We present results of atomistic simulations of a new model of a magnetic amorphous solid subjected to mechanical strains and magnetic fields. Contrary to standard magnetic random systems which are studied on a lattice with random interaction, in the present approach all the randomness comes from the glassy nature of the material. The model employed offers new perspectives on important effects like plasticity and magnetostriction. It is shown that the plastic response in such systems exhibit singularities characterized by new exponents; the spatial structure of these plastic events requires a new coarse grained elasto-magnetic theory which is provided here.
PACS: 75.50.Kj – Amorphous and quasicrystalline magnetic materials
© EPLA, 2013
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