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首页> 外文期刊>Journal of Vacuum Science & Technology >Structural and magnetic properties of NiAs-type FeSe and related alloy layers
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Structural and magnetic properties of NiAs-type FeSe and related alloy layers

机译：NiAs型FeSe及相关合金层的结构和磁性

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A single phase of β-FeSe was obtained under Se-rich conditions (β-FeSey: y ≧ 1.15) using pulsed laser deposition. The excess Se content in the layers resulted in a decrease of the unit cell volume owing to the nonstoichiometric composition. However, β-FeSey layers did not show any remarkable change of magnetic properties with the exception of decreased saturation magnetization. On the other hand, doping with Cr ions caused lattice distortions along the c-axis direction following a change of the crystallographic superstructure from 4c to 3c types, as confirmed by x-ray diffraction and temperature-dependent magnetization. As a consequence, high coercivity and high anisotropy of in-plane magnetism at 300 K were observed in Cr-rich β-Fe1-xCrxSe1.28 (x = 0.166) layers. Finally, the authors confirmed a correlation between electron transport and magnetism in β-Fe1-xCrxSe1.28 layers from the results of temperature-dependent resistivity and Hall measurements.
机译：使用脉冲激光沉积在富硒条件下（β-FeSey：y≥1.15）获得单相的β-FeSe。由于非化学计量组成，层中过量的Se含量导致晶胞体积减少。然而，除了饱和磁化强度降低之外，β-FeSey层没有显示出任何明显的磁性变化。另一方面，通过X射线衍射和随温度变化的磁化强度的确认，Cr晶体的掺杂随着结晶超微结构从4c型转变为3c型而在c轴方向上引起晶格畸变。结果，在富含Cr的β-Fe1-xCrxSe1.28（x = 0.166）层中观察到了300 K时的高矫顽力和面内磁各向异性。最后，作者从与温度有关的电阻率和霍尔测量结果中证实了β-Fe1-xCrxSe1.28层中电子传输与磁性之间的相关性。

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