Growth of a dynamical correlation length in an aging superspin glass

Abstract

We report on zero field cooled magnetization relaxation experiments on a concen- trated frozen ferrofluid exhibiting a low temperature superspin glass transition. With a method initially developed for spin glasses, we investigate the field dependence of the relaxations that take place after different aging times. We extract the typical number of correlated spins involved in the aging dynamics. This brings important insights into the dynamical correlation length and its time growth. Our results, consistent with expressions obtained for spin glasses, extend the generality of these behaviours to the class of superspin glasses. Since the typical flipping time is much larger for superspins than for atomic spins, our experiments probe a time regime much closer to that of numerical simulations.

References in corpus (23)

• Direct experimental evidence of a growing length scale accompanying the glass transition
• Memory and Chaos Effects in Spin Glasses
• Aging and Memory Effects in Superparamagnets and Superspin Glasses
• Spatial correlations in the dynamics of glassforming liquids: Experimental determination of their temperature dependence
• Spontaneous and induced dynamic fluctuations in glass-formers I: General results and dependence on ensemble and dynamics
• Geometrical Aspects of Aging and Rejuvenation in the Ising Spin Glass: A Numerical Study
• Spin glass behavior in an interacting gamma-Fe2O3 nanoparticle system
• Separation of time and length scales in spin-glasses: temperature as a microscope
• Numerical Evidence for Spontaneously Broken Replica Symmetry in 3D Spin Glasses
• Extraction of the Spin Glass Correlation Length
• Slow dynamics and aging in spin-glasses
• Spin Anisotropy and Slow Dynamics in Spin Glasses
• Out-of-equilibrium dynamical fluctuations in glassy systems
• Numerical Study on Aging Dynamics in the 3D Ising Spin-Glass Model. I. Energy Relaxation and Domain Coarsening
• Numerical Study on Aging Dynamics in the 3D Ising Spin-Glass Model. II. Quasi-Equilibrium Regime of Spin Auto-Correlation Function
• Aging Dynamics of the Heisenberg Spin Glass
• Off-Equilibrium Dynamics at Very Low Temperatures in 3d Spin Glasses
• Absence of rejuvenation in a Superspin Glass
• Monte Carlo Studies of Ising Spin Glasses and Random Field Systems
• Temperature Cycles in the Heisenberg Spin Glass
• Spin glass like transition in a highly concentrated Fe-C nanoparticle system
• Growing dynamical length, scaling and heterogeneities in the 3d Edwards-Anderson model
• Static and dynamic heterogeneities in irreversible gels and colloidal gelation

Cited by in corpus (11)

• Observation of superspin glass state in magnetically textured ferrofluid (gamma-Fe2O3)
• Blocking temperature of interacting magnetic nanoparticles with uniaxial and cubic anisotropies from Monte Carlo simulations
• Experimental Evidence of Fluctuation-Dissipation Theorem Violation in a Superspin Glass
• On the Slowing Down of Spin Glass Correlation Length Growth:simulations meet experiments
• A reentrant superspin glass state and magnetization steps in the oxyborate Co2AlBO5
• Real spin glasses relax slowly in the shade of hierarchical trees
• Dynamic Correlation Length Growth in Superspin Glass: Bridging Experiments and Simulations
• Anisotropy-axis orientation effect on the magnetization of γ-Fe2O3 frozen ferrofluid
• Zero-temperature spin-glass freezing in self-organized arrays of Co nanoparticles
• Superspin glass aging behavior in textured and nontextured frozen ferrofluid
• Ferromagnetic order in dipolar systems with anisotropy: application to magnetic nanoparticle supracrystals