首页> 外文期刊>Zeitschrift fur Physik, B. Condensed Matter >Moment-volume instabilities in Ti_xFe_(100-x) alloys with compositions around the C14 laves phase TiFe_2
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Moment-volume instabilities in Ti_xFe_(100-x) alloys with compositions around the C14 laves phase TiFe_2

机译:Ti_xFe_(100-x)合金的矩体积不稳定性,其成分在C14 Laves相TiFe_2附近

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摘要

We measured the thermal expansion and the specific heat of Ti_xFe_(100-x) alloys with x = 30.5, 32.5 and 35, all with hexagonal C14 laves phase structure (MgZn_2) like TiFe_2, and determine the temperature dependence of the magnetic contributions to the thermal expansion α_(mag) and the specific heat c_(mag). For fixed composition α_(mag)(T) and c_(mag)(T) show the same type of behavior, demonstrating that both anomalies are of the same microscopic nature. They originate from moment-volume fluctuations (antiferromagnetic Invar-effect) as a comparison with total energy calculations as a function of atomic volume and moment for TiFe_2 reveals.
机译:我们测量了x = 30.5、32.5和35的所有Ti_xFe_(100-x)合金的热膨胀率和比热,它们均具有像TiFe_2一样的六角形C14 laves相结构(MgZn_2),并确定了温度对磁性成分的温度依赖性热膨胀α_(mag)和比热c_(mag)。对于固定的成分,α_(mag)(T)和c_(mag)(T)表现出相同类型的行为,表明这两个异常具有相同的微观性质。它们源自矩量波动(反铁磁殷钢效应),作为与TiFe_2的原子量和矩函数的总能量计算结果的比较。

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