Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-06-25
Phys. Rev. Lett. 101, 137205 (2008)
Physics
Condensed Matter
Statistical Mechanics
4 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.101.137205
A new contribution to friction is predicted to occur in systems with magnetic correlations: Tangential relative motion of two Ising spin systems pumps energy into the magnetic degrees of freedom. This leads to a friction force proportional to the area of contact. The velocity and temperature dependence of this force are investigated. Magnetic friction is strongest near the critical temperature, below which the spin systems order spontaneously. Antiferromagnetic coupling leads to stronger friction than ferromagnetic coupling with the same exchange constant. The basic dissipation mechanism is explained. If the coupling of the spin system to the heat bath is weak, a surprising effect is observed in the ordered phase: The relative motion acts like a heat pump cooling the spins in the vicinity of the friction surface.
Hucht Alfred
Kadau Dirk
Wolf Dietrich E.
No associations
LandOfFree
Magnetic friction in Ising spin systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Magnetic friction in Ising spin systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic friction in Ising spin systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-230141