Magnetomechanical properties of nanogranular Co–Fe–Al–O films
Magnetomechanical properties of nanogranular Co–Fe–Al–O films
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DOI：
10.1063/1.1859213
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发表时间：
2005-05
影响因子：
3.2
通讯作者：
M. Pasquale;C. Sasso;A. Magni;F. Celegato;J. Sohn;S. Lim
中科院分区：
文献类型：
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作者：
M. Pasquale;C. Sasso;A. Magni;F. Celegato;J. Sohn;S. Lim
利用不同的实验技术，我们分析了软纳米颗粒CoFeAlO薄膜的厚度从125到550 nm之间的结构和磁力行为之间的相互作用。溅射膜的特征在于40-nm的FeCo晶粒和16 kG的饱和磁化强度。结果表明，由于机械刚性和绝缘性的Al-O基体的作用，电阻率的增加导致各向异性场的增加，铁磁共振频率也随之增加。125 nm厚的薄膜具有各向异性场和电阻率的最佳组合，导致估计的铁磁共振频率约为1.9GHz。
Using different experimental techniques we analyze the interplay between the structure and the magnetomechanical behavior of soft nanogranular CoFeAlO films with thickness ranging from 125to550nm. The sputtered film is characterized by 40-nm FeCo grains and a saturation magnetization of 16kG. The results show that, due to the role of the mechanically stiff and insulating Al–O matrix, an increase of the resistivity leads to an increase of the anisotropy field and also of the ferromagnetic resonance frequency. The 125-nm-thick films possess the best combination of anisotropy field and resistivity leading to an estimated ferromagnetic resonance frequency around 1.9GHz.