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- W1983008849 abstract "Effects of external hydrostatic pressure up to 1.2 GPa and the Al-Ga alloying on the magnetism in ${mathrm{UCoAl}}_{1ensuremath{-}x}{mathrm{Ga}}_{x}$ compounds have been studied. Ga substitutions for Al in UCoAl lead to gradual transformation of a $5f$-band metamagnetism towards ferromagnetism (for $x>~0.2$). The application of pressure yields reverse effects clearly seen in compounds with $x<~0.4.$ The spontaneous magnetization ${ensuremath{mu}}_{s}$ and the Curie temperature ${T}_{C}$ of ferromagnetic compounds are gradually suppressed with increasing pressure. The values of $dmathrm{ln}{T}_{C}/dp$ and $dmathrm{ln}{ensuremath{mu}}_{s}/dp$ slowly increase with x decreasing down to 0.4, whereas for $x<0.4$ an abrupt growth of pressure parameters is observed with further lowering Ga content. This is a fingerprint of a pressure-induced collapse of ferromagnetism and a simultaneous reentrance of the ``UCoAl-type'' metamagnetism in compounds with lower Ga content $(x<~0.3).$ The observed evolution of magnetism is discussed in terms of pressure and alloying-induced variation of the $5f$-ligand hybridization that determines both the stability of the U magnetic moment and the strength of U-U exchange interactions." @default.
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- W1983008849 date "1999-07-01" @default.
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- W1983008849 title "Alloying and pressure-induced transitions between5f-band metamagnetism and ferromagnetism" @default.
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- W1983008849 doi "https://doi.org/10.1103/physrevb.60.1122" @default.
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