Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 58: Spincaloric Transport I (jointly with MA)

TT 58.6: Vortrag

Mittwoch, 18. März 2015, 10:45–11:00, H 0110

Spin-Phonon Interactions and Magnetoelastic Modes — •Matthias Assmann and Ulrich Nowak — University Konstanz, 78457 Konstanz, Germany

For modern spin-caloritronic applications in insulators the interactions between the magnonic and the phononic system play the decisive role. We developed a model, which allows a coupling between these two thermodynamic sub-systems under strict observance of energy and angular momentum conservation laws. For this model we perform spin-molecular dynamics simulations, which take into account the spatial as well as the spin degrees of freedom. The coupling between the spin and lattice degrees of freedom is achieved by pseudo dipolar forces. A temperature gradient is applied by appropriate boundary condition and the excitation of magneto-elastic modes in form of a coupled transport of magnons and phonons in the temperature gradient is studied.