Perpendicular magnetic anisotropy of TiN buffered Co2FeAl/MgO bilayers
Perpendicular magnetic anisotropy of TiN buffered Co2FeAl/MgO bilayers
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DOI：
10.1063/1.4984891
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发表时间：
2017-06
影响因子：
3.2
通讯作者：
A. Niesen;J. Ludwig;M. Glas;Robin Silber;J. Schmalhorst;E. Arenholz;G. Reiss
中科院分区：
文献类型：
--
作者：
A. Niesen;J. Ludwig;M. Glas;Robin Silber;J. Schmalhorst;E. Arenholz;G. Reiss
研究了TiN缓冲Co2FeAl薄膜的晶体学和磁性能。室温沉积的Heusler化合物导致高结晶有序。测量了Co2FeAl薄膜矫顽力、正方比和各向异性常数与层厚和退火后温度的关系。在0.9 nm的Co2FeAl薄膜上观察到较高的垂直磁各向异性。在325℃退火后的温度下得到了1的平方比，比以往的研究要低。它在高达500°C的温度下保持不变。为了研究元素的比磁矩，进行了表面敏感x射线吸收和x射线磁圆二色性测量。磁矩为5.4±0.4 μB/f.u。测定了1nm薄层的Co2FeAl，这与之前报道的Cr或MgO缓冲Co2FeAl的值很好地一致。
We investigated crystallographic and magnetic properties of TiN buffered Co2FeAl thin films. Room temperature deposition of the Heusler compound led to high crystalline ordering. The layer thickness and post annealing temperature dependence of the coercivity, squareness ratio, and the anisotropy constant of the thin Co2FeAl films were measured. High perpendicular magnetic anisotropy was observed for the 0.9 nm thin Co2FeAl film. A squareness ratio of one was reached at 325 °C post annealing temperature, which is lower compared to previous studies. It remained constant for temperatures up to 500 °C. Surface sensitive x-ray absorption and x-ray magneto circular dichroism measurements were carried out, in order to investigate the element specific magnetic moments. A magnetic moment of 5.4 ± 0.4 μB/f.u. for the 1 nm thin Co2FeAl was determined, which is in good agreement with the previously reported values for Cr or MgO buffered Co2FeAl.