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@TECHREPORT{Maletta:845424,
      author       = {Maletta, H. and Zinn, W.},
      title        = {{S}pin glasses},
      volume       = {2084},
      number       = {Juel-2084},
      address      = {Jülich},
      publisher    = {Kernforschungsanlage Jülich, Verlag},
      reportid     = {FZJ-2018-02692, Juel-2084},
      series       = {Berichte der Kernforschungsanlage Jülich},
      pages        = {217 p.},
      year         = {1986},
      abstract     = {In recent years there has been an upsurge of interest in
                      the research an the spin-glass phenomenon. The term "spin
                      glass" was introduced in 1968; now about one paper per day
                      is published uhich uses this word in its title or abstract
                      (For recent reviews see : Fischer, 1983a and 1985; Binder
                      and Young, 1986; Huang, 1985). There is now general
                      agreement an the "definition" of a spin glass: Spin glass
                      refers to a magnetic state of a system in uhich interactions
                      between the magnetic moments are "in conflict" with each
                      other due to disorder so that the spins order in a
                      non-periodic fashion - they "freeze" into
                      $\underline{random}$ directions. Additionally, the state is
                      characterized by very slow equilibration after perturbation
                      and significant history-dependence. Taking these features
                      tagether means that we are going to apply the term "spin
                      glass" here in the restricted sense, as mostly dune, and not
                      to all random non-collinear ordered magnets, e. g. not to
                      systems with random anisotropy axes (see section 9) or to
                      systems wich random fields. The new type of magnetic order
                      is represented schematically in Fig. 1 where its
                      magnetization measured in a small applied field is compared
                      (in its magnitude and temperature dependences) with that of
                      tue wellknown types of collinear magnetic order, too. The
                      increasing interest in spin glasses may have the following
                      reasons; (i) Spin-glass properties are fairly universal.
                      They have been observed in a wide variety of different
                      systems with competing interactions between the spins e. g.
                      in crystalline metals Fe$_{x}$Au$_{1-x}$ (Cannella and
                      Mydosh, 1972), in crystalline insulators Eu$_{x}$Sr$_{1-x}$S
                      (Maletta and Crecelius, 1976) as well as in amorpheus alloys
                      Gd$_{x}$Al$_{1-x}$ (Mizoguchi et al., 1977). (ii) Spin glass
                      behavior is novel ; it is an intrinsic effect of disorder
                      and competition of the magnetic interactions. Attempts to
                      understand the origin and behavior of the spin-glass
                      statehave led to the appreciationof several neu concepts and
                      to the recognition that the fundamental ingredients for
                      these concepts are much more widespread in occurrence than
                      spin glasses. The study has had important impact in
                      statistical mechanics, and recently also applicatians on
                      complex optimation [...]},
      cin          = {PRE-2000},
      cid          = {I:(DE-Juel1)PRE2000-20140101},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)29},
      url          = {https://juser.fz-juelich.de/record/845424},
}