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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3291-3296 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The dynamics of magnetic fluctuations have been investigated in the random frustrated antiferromagnet Cd1−xMnxTe. The frequency-dependent susceptibility, χ'(ω,T) has been measured by Faraday rotation for x=0.4 and 0.65. The departure of the susceptibility from equilibrium Δχ'=[χeq(T)−χ'(ω,T)]/χeq(T) is found to obey activated dynamic scaling similar to that seen in random field systems. These results in conjunction with neutron measurements by others which revealed the abrupt saturation of the antiferromagnetic correlation length for x=0.65 at the onset of slow dynamics near Tc suggest a dynamically inhibited transition to a type-III AF state rather than a spin-glass transition.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 1691-1696 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Design, hardware, and operating software of a special purpose computer built for the Monte Carlo simulations of a wide class of random Ising spin systems is described. The machine is quite versatile, easy to operate, and executes programs written in a high level C language. It is a 32-bit bus oriented system, with a very fast, dedicated Monte Carlo processor and a general purpose single-board computer sharing the 16-Mbyte address space. The former processor executes the basic Monte Carlo heat bath algorithm, and the latter performs required physical "measurements'' on spin configurations and handles communication with a UNIX host machine. The host computer is used to compile and download programs and to receive small quantities of reduced data for permanent storage and further analysis.
    Type of Medium: Electronic Resource
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