「非線形・統計力学とその周辺」セミナーのご案内

第85回「非線形・統計力学とその周辺」セミナーのご案内

日時:平成19年6月15日(金)15時から

場所:京都大学工学部総合校舎102講義室(吉田キャンパス)

講演者:Per Arne Rikvold (Department of Physics, Florida State University)

講演題目:
Dynamic Phase Transition in Kinetic Ising Models Driven by an Osillating Field:
New Experiments and Results on the Conjugate Field and
a Nonequilibrium Fluctuation-Dissipation Relation

講演要旨:

Kinetic Ising models driven by a temporally oscillating applied field
undergo a nonequilibrium phase transition in the Ising universality
class at a critical value of the ratio of the period of the applied
field to the intrinsic time scale for magnetization switching in the
Ising system. Following a short introduction to the phenomenon I discuss
a recent experimental observation in [Co/Pt]_3 multilayers, as well as
kinetic Monte Carlo simulations that establish the field conjugate to
the dynamic order parameter and demonstrate the existence of a
nonequilibrium fluctuation-Dissipation relation in the critical region.