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首页> 外文期刊>Bulletin of the American Physical Society >APS -84th Annual Meeting of the APS Southeastern Section - Event - Experimental Studies of Transport Properties of Novel Amorphous Fe-Tb-Dy-O Thin Films
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APS -84th Annual Meeting of the APS Southeastern Section - Event - Experimental Studies of Transport Properties of Novel Amorphous Fe-Tb-Dy-O Thin Films

机译:APS-APS东南部第84届年会-活动-新型非晶Fe-Tb-Dy-O薄膜传输特性的实验研究

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Novel amorphous material Fe-Tb-Dy-Oxide shows a remarkable combination of very high optical transparency, electrical conductivity, and Hall mobility. Material properties can be tuned by changing the R-value, the atomic ratio of iron to the two lanthanides, during the deposition. This makes the material a potential candidate for a wide range of applications in energy conversion, electronics, photonics, and spintronics.This work focuses on the transport properties of the samples with R-values between 6 and 12, which correspond to 8 - 14 {%} of lanthanides in the iron oxide matrix. Films were grown by ion beam evaporation, then some films were annealed in various environments. Electrical resistivity, Hall Effect, and magnetoresistance were measured in the Van-der Pauw geometry at T$=$300 K in magnetic fields up to 13 kGs. The samples were heated to 700K, while resistivity and Hall Effect were monitored in-situ. After the samples cooled to T$=$300K, the transport properties were re-measured. This protocol was repeated for as long as the electrical contacts of a given sample remained linear. We will discuss the effect of the initial annealing on the sample properties as well the evolution of the transport properties of as-deposited samples as a result of the thermal cycling.
机译:新型非晶态材料Fe-Tb-Dy-Oxide具有非常高的光学透明性,电导率和霍尔迁移率的显着组合。可以通过在沉积过程中更改R值(铁与两种镧系元素的原子比)来调整材料属性。这使得该材料成为在能量转换,电子,光子学和自旋电子学中广泛应用的潜在候选者。这项工作着眼于R值介于6和12之间(对应于8-14 {氧化铁基质中镧系元素的%}。通过离子束蒸发来生长膜,然后在各种环境中对某些膜进行退火。电阻率,霍尔效应和磁阻在高达13 kGs的磁场中以T $ = $ 300 K的Van-der Pauw几何尺寸测量。将样品加热到700K,同时现场监测电阻率和霍尔效应。样品冷却至T $ = $ 300K后,重新测量运输性能。只要给定样品的电接触保持线性,就重复该协议。我们将讨论初始退火对样品性能的影响,以及由于热循环而沉积的样品的传输性能的演变。

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