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- W2104812345 abstract "Magnetic and transport properties of ${mathrm{YMn}}_{6}{mathrm{Sn}}_{6ensuremath{-}x}{mathrm{Ga}}_{x} (0<~x<~1.8)$ compounds with the ${mathrm{HfFe}}_{6}{mathrm{Ge}}_{6}$-type structure were investigated. It was found that Ga substitution leads to a contraction of the unit-cell volume. A transition from an antiferromagnetic to a ferromagnetic (or ferrimagnetic) state can be observed for $0.1<~x<~0.2$ with increasing temperature. The antiferro--ferromagnetic transition for samples with $x<~0.2$ can also be induced by an external field. The metamagnetic transition field is very low, and decreases with increasing Ga concentration. Higher Ga concentration $(x>0.2)$ leads to the samples being ferromagnetic in the whole temperature range below the Curie temperature. Ga substitution weakens the interlayer magnetic coupling between the Mn spins. Corresponding to the metamagnetic transition, a magnetoresistance as large as 32% in a field of 5 T was observed at 5 K for the sample with x=0.2. Results from the ${}^{119}mathrm{Sn}$ Mossbauer spectra indicate that the Mn--Mn coupling through the ``Mn--Sn--Sn--Mn'' slab change from antiferromagnetic in ${mathrm{YMn}}_{6}{mathrm{Sn}}_{6}$ to ferromagnetic by the substitution of Ga for Sn." @default.
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- W2104812345 date "2001-11-08" @default.
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- W2104812345 title "Magnetism and giant magnetoresistance of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>YMn</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Sn</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ga</…" @default.
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- W2104812345 doi "https://doi.org/10.1103/physrevb.64.212404" @default.
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