Atomistic spin dynamics of the Cu-Mn spin-glass alloy
2009 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 79, no 2, 024411- p.Article in journal (Refereed) Published
We demonstrate the use of Langevin spin dynamics for studying dynamical properties of an archetypical spin-glass system. Simulations are performed on CuMn (20% Mn) where we study the relaxation that follows a sudden quench of the system to the low-temperature phase. The system is modeled by a Heisenberg Hamiltonian where the Heisenberg interaction parameters are calculated by means of first-principles density-functional theory. Simulations are performed by numerically solving the Langevin equations of motion for the atomic spins. It is shown that dynamics is governed, to a large degree, by the damping parameter in the equations of motion and the system size. For large damping and large system sizes, we observe the typical aging regime.
Place, publisher, year, edition, pages
2009. Vol. 79, no 2, 024411- p.
Spin glasses and other random magnets, Numerical simulation studies, Spin-glass and other random models
Engineering and Technology
Research subject Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-122318DOI: 10.1103/PhysRevB.79.024411ISI: 000262978100056OAI: oai:DiVA.org:uu-122318DiVA: diva2:309674