Magnetic percolation in diluted magnetic semiconductors

Bergqvist, Lars,1976-Uppsala universitet,KTH,Tillämpad materialfysik,Teoretisk magnetism (författare)

QC 20110916
We demonstrate that the magnetic properties of diluted magnetic semiconductors are dominated by short ranged interatomic exchange interactions that have a strong directional dependence. By combining first principles calculations of interatomic exchange interactions with a classical Heisenberg model and Monte Carlo simulations, we reproduce the observed critical temperatures of a broad range of diluted magnetic semiconductors. We also show that agreement between theory and experiment is obtained only when the magnetic atoms are randomly positioned. This suggests that the ordering of diluted magnetic semiconductors is heavily influenced by magnetic percolation, and that the measured critical temperatures should be very sensitive to details in the sample preparation, in agreement with observations.

Eriksson, OlleUppsala universitet,Teoretisk magnetism(Swepub:uu)olleerik (författare)
Kudrnovsky, J (författare)
Drchal, V (författare)
Korzhavyi, PavelKTH,Materialvetenskap(Swepub:kth)u17nfa0i (författare)
Turek, I (författare)
KTHTillämpad materialfysik (creator_code:org_t)

Av författaren/redakt...: Bergqvist, Lars, ...; Eriksson, Olle; Kudrnovsky, J; Drchal, V; Korzhavyi, Pavel; Turek, I

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.