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- W2005236434 abstract "We consider a random alloy ${A}_{x}{B}_{1ensuremath{-}x}$ with two magnetic components, $A$ and $B$ and nearest- neighbor exchange interactions ${J}_{mathrm{AA}}$, ${J}_{mathrm{AB}}$, and ${J}_{mathrm{BB}}$. The Migdal recursion relations for scaling length factor $b=3$ are applied to this system. We obtain a magnetic phase diagram containing a paramagnetic ($P$), a ferromagnetic ($F$), an antiferromagnetic (AF), and a mixed ($mathrm{SG}+F$) phase. The mixed phase is ferromagnetic and frustrated. The model is discussed in context with the system ${mathrm{Ni}}_{x}{mathrm{Mn}}_{1ensuremath{-}x}$. The low-temperature phase is AF for small $x$, $F$ for $xensuremath{lesssim}1$, and mixed for intermediate concentrations. The transition from the mixed phase to $P$ is always through an intermediate $F$ phase. Small concentrations of one alloy component can enhance the transition temperature of the alloy (constructive interference). The magnetization is discussed within N'eel's molecular-field theory." @default.
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- W2005236434 date "1982-06-01" @default.
- W2005236434 modified "2023-09-25" @default.
- W2005236434 title "Coexistence of a spin-glass and ferromagnetic phase in alloys with two magnetic components and exchange interactions of opposite signs" @default.
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- W2005236434 doi "https://doi.org/10.1103/physrevb.25.6771" @default.
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