Results 311 to 320 of about 369,124 (332)

Spin Glasses

Journal of Statistical Physics, 1984
Abstract The topic that I am going to discuss, spin glasses, combines two of Roger Elliott’s many interests: phase transitions and disordered systems. When I started research as Roger’s student, he suggested that I work on the theory of excitations in systems undergoing co-operative Jahn-Teller phase transitions.
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How thin a spin glass is still a spin glass?

Physical Review Letters, 1991
The quasistatic spin-freezing temperature ${\mathit{T}}_{\mathit{f}}$ of thin layers of CuMn and AgMn remains nonzero down to thicknesses ${\mathit{W}}_{\mathrm{SG}}$ of 1 and 2 monolayers, respectively. These alloys thus remain spin glasses at such layer thicknesses, in agreement with published evidence of similar behavior for a two-dimensional, short-
R. Stubi, Reza Loloee, Jack Bass, L. Hoines, J. A. Cowen   +4 more
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Scaling in Spin-Glasses

Physical Review Letters, 1985
Many results of the mean-field theory of spin-glasses violate simple scaling laws, including the magnetic field dependence of the transition lines, crossover effects of random anisotropy, and critical behavior in the ordered phase. These violations arise from two dangerously irrelevant variables.
Haim Sompolinsky, Daniel S. Fisher
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Dynamics in spin glasses

Physical Review B, 1991
Below the freezing temperature ${\mathit{T}}_{\mathit{g}}$, the configuration space of spin glasses is characterized by the existence of quasidegenerate equilibrium states whose number increases drastically as the temperature is lowered. The observed time dependence of the dynamical properties (aging effects) can be understood as the trend of the ...
Raymond Lee Orbach, M. Ocio, M. Lederman, J. Hammann, Eric Vincent   +4 more
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Relaxation in spin glasses [PDF]

Journal of Magnetism and Magnetic Materials, 1978
The paper discusses the relaxation of the magnetisation, M, and the order parameter q, in spin glasses with arbitrary spin S, within the mean field approximation. It is shown that the rate of the relaxation of the order parameter is slowed down as the spin glass freezing temperature is approached from either above or below. The relaxation of M for T>Tf
Arza Ron, Ilan Riess, M. Fibich
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Dynamics of an Ising Spin-Glass in the Vicinity of the Spin-Glass Temperature

Physical Review Letters, 1988
The dynamics of the short-range Ising spin-glass ${\mathrm{Fe}}_{0.5}$${\mathrm{Mn}}_{0.5}$Ti${\mathrm{O}}_{3}$ has been investigated with a SQUID magnetometer. The dynamic spin-correlation function, $q(t)$, as reflected in low-field ac susceptibility and time-dependent magnetization measurements, was studied in the time interval ${10}^{\ensuremath{-}6}
Peter Svedlindh, L. Lundgren, Atsuko Ito, Klas Gunnarsson, Per Nordblad, H. Aruga   +5 more
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Spin glasses and replicas

Physica A: Statistical Mechanics and its Applications, 1984
Abstract In this talk I present some of the basic ideas in the replica approach to the thermodynamics of spin glasses.
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From Spin Glasses to Glasses

MRS Proceedings, 1996
ABSTRACTWe discuss some aspects of the links between the behaviour and theory of spin glasses and that of structural glasses of the fragile type. We review the present status of the conjecture according to which a certain class of spin glass mean field theories (those with first order transitions) could provide a mean field theory for the glass ...
J. P. Bouchaud, M. Mezard
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Perspectives on Spin Glasses

2012
Presenting and developing the theory of spin glasses as a prototype for complex systems, this book is a rigorous and up-to-date introduction to their properties. The book combines a mathematical description with a physical insight of spin glass models.
CONTUCCI, PIERLUIGI, GIARDINA', CRISTIAN
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Spin flop in a spin glass

Journal of Applied Physics, 1979
Alloys in the system Ni.95 S Fe exhibit uniaxial anisotropy which is similar in magnitude to the exchange. Ni.95 S is a non-magnetic d-band metal and iron a magnetic impurity, so the system bears some resemblance to an Ising spin glass. Anisotropy modifies the magnetic properties as compared with a normal spin glass, giving a susceptibility more like ...
J. M. D. Coey, H. Roux-Buisson
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