Theoretical Analysis of Inertia-like Switching in Magnets: Applications to a Synthetic Antiferromagnet
2012 (English)In: PHYS REV X, ISSN 2160-3308, Vol. 2, no 1, 011013- p.Article in journal (Refereed) Published
The magnetization dynamics of a synthetic antiferromagnet subjected to a short-magnetic-field pulse has been studied by using a combination of first principles calculations and atomistic spin-dynamics simulations. We observe switching phenomena on the time scale of tens of picoseconds, and inertia-like behavior in the magnetization dynamics. We explain the latter in terms of a dynamic redistribution of magnetic energy from the applied-field pulse to other possible energy terms, such as the exchange interaction and the magnetic anisotropy, without invoking concepts such as the inertia of an antiferro-magnetic vector. We also demonstrate that such dynamics can also be observed in a ferromagnetic material where the incident-field pulse pumps energy to the magnetic anisotropy.
Place, publisher, year, edition, pages
2012. Vol. 2, no 1, 011013- p.
IdentifiersURN: urn:nbn:se:uu:diva-187121DOI: 10.1103/PhysRevX.2.011013ISI: 000310511700001OAI: oai:DiVA.org:uu-187121DiVA: diva2:573777