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首页> 外文期刊>Journal of Physics. Condensed Matter >Anisotropic magnetic behavior in EuIr2Ge2 single crystal
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Anisotropic magnetic behavior in EuIr2Ge2 single crystal

机译：EuIr2Ge2单晶的各向异性磁行为

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We present a complete characterization of the magnetic properties of indium-flux grown single crystals of EuIr2Ge2 using electrical resistivity, magnetization, specific heat, magnetoresistance and Eu-151 Mossbauer spectroscopy. All results indicate that Eu ions in EuIr2Ge2 are in the divalent state with Eu moments ordering antiferromagnetically at T-N = 20.5 K. While at higher temperatures the susceptibility chi is isotropic as expected for the pure spin nature of the Eu local moment, below 40 K a pronounced anisotropy emerges, with chi(ab) in the basal plane being a factor of two larger than chi(c) along c at T-N. We observed a pronounced metamagnetic transition in the in-plane magnetization, which is also reflected in a step-like increase of the magnetoresistance. Further analysis of the data indicates that the metamagnetic transition is related to a spin-flop transition. The origin of this strong anisotropy and of the pronounced metamagnetic transition is discussed.
机译：我们提供了使用电阻率，磁化强度，比热，磁阻和Eu-151 Mossbauer光谱对EuIr2Ge2铟通量生长的单晶的磁性的完整表征。所有结果表明，EuIr2Ge2中的Eu离子处于二价态，在TN = 20.5 K时Eu矩反铁磁性排列。在较高温度下，磁化率chi是各向同性的，这是Eu局部矩的纯自旋性质所期望的，低于40 K a出现了明显的各向异性，基面上的chi（ab）比沿TN的c的chi（c）大两倍。我们在面内磁化过程中观察到明显的亚磁跃迁，这也反映在磁阻的阶梯状增加中。数据的进一步分析表明，亚磁跃迁与自旋跃迁有关。讨论了这种强各向异性和明显的亚磁跃迁的起源。

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