Spin-glass-like transition in a highly concentrated Fe–C nanoparticle system

Anomaly of Ac Resistance in Magnetic Nanoparticle Alloys at Spin-glass-like Transition

A combined study of magnetic susceptibility and AC resistance was performed on melt-spun Cu-Co granular magnetic ribbons. The AC resistance as a function of temperature has a sharp maximum. We associate it with a diverging correlation length at the temperature of collective freezing of magnetic moments via increasing magnetic losses in the induced non-uniform field. Application of this model to...

Fragility of the spin-glass-like collective state to a magnetic field in an interacting Fe- C nanoparticle system

Proteinlike behavior of a spin system near the transition between a ferromagnet and a spin glass.

A simple spin system is studied as an analog for proteins. We investigate how the introduction of randomness and frustration into the system affects the designability and stability of ground-state configurations. We observe that the spin system exhibits proteinlike behavior in the vicinity of the transition between a ferromagnet and a spin glass. Our results illuminate some guiding principles i...

Proteinlike behavior of a spin system near the transition between ferromagnet and spin glass

A simple spin system is studied as an analog for proteins. We investigate how the introduction of randomness and frustration into the system effects the designability

Ground State Structure in a Highly Disordered Spin Glass Model

We propose a new Ising spin glass model on Z of Edwards-Anderson type, but with highly disordered coupling magnitudes, in which a greedy algorithm for producing ground states is exact. We find that the procedure for determining (infinite volume) ground states for this model can be related to invasion percolation with the number of ground states identified as 2 , where N = N (d) is the number of...