Finite versus zero-temperature hysteretic behavior of spin glasses: Experiment and theory

Abstract

We present experimental results attempting to fingerprint nonanalyticities in the magnetization curves of spin glasses found by Katzgraber et al. [Phys. Rev. Lett. 89, 257202 (2002)] via zero-temperature Monte Carlo simulations of the Edwards-Anderson Ising spin glass. Our results show that the singularities at zero temperature due to the reversal-field memory effect are washed out by the finite temperatures of the experiments. The data are analyzed via the first order reversal curve (FORC) magnetic fingerprinting method. The experimental results are supported by Monte Carlo simulations of the Edwards-Anderson Ising spin glass at finite temperatures which agree qualitatively very well with the experimental results. This suggests that the hysteretic behavior of real Ising spin-glass materials is well described by the Edwards-Anderson Ising spin glass. Furthermore, reversal-field memory is a purely zero-temperature effect.

5 pages, 5 figures (FORC diagrams in low quality due to arXiv file-size limits)

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Cited by in corpus (5)

• Deep Spin-Glass Hysteresis Area Collapse and Scaling in the $d=3$ $\pm J$ Ising Model
• Non-equilibrium hysteresis and spin relaxation in the mixed-anisotropy dipolar coupled spin-glass LiHo${}_{0.5}$Er${}_{0.5}$F${}_4$
• Ground-state magnetization of the Ising spin glass: A recursive numerical method and Chen-Ma scaling
• Efficient sampling using Macrocanonical Monte Carlo and density of states mapping
• Hysteresis loop signatures of phase transitions in a mean-field model of disordered Ising magnet