通过引入强磁晶各向异性增强软磁薄膜中尼尔壁的膜厚。
Enhanced film thickness for Néel wall in soft magnetic film by introducing strong magnetocrystalline anisotropy.
作者信息
Xu Fei, Wang Tao, Ma Tianyong, Wang Ying, Zhu Shimeng, Li Fashen
机构信息
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China.
出版信息
Sci Rep. 2016 Jan 29;6:20140. doi: 10.1038/srep20140.
This study investigated the magnetic domain walls in a single-layer soft magnetic film with strong magnetocrystalline anisotropy energy. The soft magnetic film is composed of a highly c-axis-oriented hcp-Co81Ir19 alloy with strong negative magnetocrystalline anisotropy. The domain structure of the soft Co81Ir19 films with thickness ranging from 50-230 nm in a demagnetization state was observed through magnetic force microscopy and Lorentz transmission electron microscopy. Results reveal that the critical transition thickness at which the domain wall changes from Néel type to Bloch type is about 138 nm, which is much larger than the critical value of traditional Fe- and Co-based soft magnetic films with negligible magnetocrystalline anisotropy. Theoretical calculation was also performed and the calculated result agrees well with experimental data.
本研究调查了具有强磁晶各向异性能量的单层软磁薄膜中的磁畴壁。该软磁薄膜由具有强负磁晶各向异性的高度c轴取向的hcp-Co81Ir19合金组成。通过磁力显微镜和洛伦兹透射电子显微镜观察了退磁状态下厚度范围为50 - 230nm的软Co81Ir19薄膜的畴结构。结果表明，畴壁从奈尔型转变为布洛赫型的临界转变厚度约为138nm，这比磁晶各向异性可忽略不计的传统铁基和钴基软磁薄膜的临界值大得多。还进行了理论计算，计算结果与实验数据吻合良好。
Zotero 插件