Structure and Isotropic High-Frequency Response of Co-HfN Nanogranular Films
Structure and Isotropic High-Frequency Response of Co-HfN Nanogranular Films
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DOI：
10.1109/tmag.2015.2438003
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发表时间：
2015-06
影响因子：
2.1
通讯作者：
Yang Cao;Yiwen Zhang;S. Ohnuma;N. Kobayashi;H. Masumoto
中科院分区：
文献类型：
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作者：
Yang Cao;Yiwen Zhang;S. Ohnuma;N. Kobayashi;H. Masumoto
沉积不同Co含量的Co-HfN纳米颗粒薄膜，获得高频软磁性能。该薄膜在较宽的成分范围内表现出垂直磁各向异性。矫顽力约为 15-75 Oe，这归因于生长诱导的 Co 柱状结构。磁滞回线和磁力显微镜图像都表明薄膜在磁面内各向同性。 Co58Hf14N28薄膜的磁导率和铁磁共振频率分别为40和2 GHz，这与基于Landau-Lifshitz-Gilbert（L.L.G）方程的理论计算结果一致。该薄膜由结晶 Co 纳米颗粒和非晶 HfN 基质组成。
The Co-HfN nanogranular films with different Co content were deposited, to obtain high-frequency soft magnetic properties. The films exhibit perpendicular magnetic anisotropy over a wide composition range. The coercivity is ~15-75 Oe, which is attributed to the growth-induced Co columnar structure. Both hysteresis loops and magnetic force microscopy images demonstrate that the films are magnetically in-plane isotropic. The permeability and ferromagnetic resonance frequency of the Co58Hf14N28 films are 40 and 2 GHz, respectively, which is consistent with the theoretical calculation based on Landau-Lifshitz-Gilbert (L.L.G) equation. The films consist of crystallized Co nanogranules and amorphous HfN matrix.