Evidence for a Ferromagnet—Spin-Glass Transition inPdFeMn
1978, Physical Review Letters
https://doi.org/10.1103/PHYSREVLETT.40.586Abstract
Measurements of the low-field ac susceptibility on ternary alloys of Pd+0.85 at. % Fe and a Mn concentration of 0 to 8 at. jp reveal, for three distinct regimes of Mn concen
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- The Edwards-Anderson spin-glass phase is studied via time-dependent Ginzburg-Lan- dau models with quenched impurities. A perturbation expansion is used to study the dyna- mics and statics without the use of the replica method. It is shown that the spin correla- tion function has at ' long-time tail in the spin-glass phase.
- The Edwards-Anderson spin-glass phase, characterized by a frozen magnetization with zero spatial average, has received much recent attention. ' ' Most of the analytical studies have been on the static properties using the replica (n-0} method. In this Letter we report results on both the dynamics and statics ot certain time-dependent Ginzburg-Landau (TDGL) models which exhibit a spin-glass phase. We make no use of the replica method. In fact, it is our purpose to avoid the replica method, which is in several ways artificial and conceals the basic physics. This simple analysis, using TDGI. models, is complementary to the numerical Monte Carlo work and to other methods reported recently. " Our models are defined by the following equation of motion for an n-component vector spin density