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- W2022830992 endingPage "4973" @default.
- W2022830992 startingPage "4963" @default.
- W2022830992 abstract "We have measured the ac nonlinear susceptibilities ${ensuremath{chi}}_{3}^{mathcal{'}}$, ${ensuremath{chi}}_{5}^{mathcal{'}}$, and ${ensuremath{chi}}_{7}^{mathcal{'}}$ of very dilute AgMn spin glasses above and below the transition temperature ${T}_{g}$ as a function of frequency, temperature and magnetic field. In the static limit, these quantities display well-defined critical singularities at ${T}_{g}$ and imply a divergence of the spin-glass correlation length. The nonlinear susceptibilities can be fitted above ${T}_{g}$ to powers of frequency with weakly temperature-dependent exponents. While the effective exponents satisfy the relations imposed by static and dynamic scaling, the observed temperature and frequency roundings suggest that the spin-glass correlation length does not actually become infinite and is cut off at a length scale of 2000 Ar{}. Activated behavior in the vicinity of ${T}_{g}$ with a logarithmic dynamic scaling also accounts for the measured dynamical nonlinear susceptibilities. The measured critical exponents (ensuremath{beta}=0.9, ensuremath{gamma}=2.3, ensuremath{delta}=3.3, ensuremath{nu}=1.3, z=5.4) are not mean field, and differ from the exponents obtained by Monte Carlo simulation of short-range Ising systems." @default.
- W2022830992 created "2016-06-24" @default.
- W2022830992 creator A5024301267 @default.
- W2022830992 date "1988-09-01" @default.
- W2022830992 modified "2023-10-10" @default.
- W2022830992 title "Critical dynamics of metallic spin glasses" @default.
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- W2022830992 doi "https://doi.org/10.1103/physrevb.38.4963" @default.
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