Atomistic spin dynamics simulations on Mn-doped GaAs and CuMn
2010 (English)In: International Conference on Magnetism (ICM 2009), 2010, Vol. 200, no 7, 072040- p.Conference paper (Refereed)
The magnetic dynamical behavior of two random alloys have been investigated in atomistic spin dynamics (ASD) simulations. For both materials, magnetic exchange parameters calculated with first principles electronic structure methods were used. From experiments it is well known that CuMn is a highly frustrated magnetic system and a good manifestation of a Heisenberg spin glass. In our ASD simulations the behavior of the autocorrelation function indicate spin glass behavior. The diluted magnetic semiconductor (DMS) Mn-doped GaAs is engineered with hopes of high enough Curie temperatures to operate in spintronic devices. Impurities such as As antisites and Mn interstitials change the exhange couplings from being mainly ferromagnetic to also have antiferromagnetic components. We explore how the resulting frustration affects the magnetization dynamics for a varying rate of As antisites.
Place, publisher, year, edition, pages
2010. Vol. 200, no 7, 072040- p.
, Journal of Physics: Conference Series, ISSN 1742-6588 ; 200
IdentifiersURN: urn:nbn:se:uu:diva-120102DOI: 10.1088/1742-6596/200/7/072040ISI: 000291321302160OAI: oai:DiVA.org:uu-120102DiVA: diva2:302505
International Conference on Magnetism (ICM 2009) Karlsruhe, Germany, Jul 26-31, 2009