Magnetic domain wall energy in Ni/Co superlattice
Magnetic domain wall energy in Ni/Co superlattice
复制标题
Ni/Co超晶格中的磁畴壁能量
DOI：
10.1016/j.jmmm.2014.07.046
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发表时间：
2014
影响因子：
2.7
通讯作者：
Yu Shiratsuchi and Ryoichi Nakatani
中科院分区：
文献类型：
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作者：
Kentaro Toyoki;Takashi Nishimura;Shotaro Harimoto;Yu Shiratsuchi and Ryoichi Nakatani
利用Kooy和Enz（1960）的磁畴理论，确定了具有垂直磁各向异性的Ni/Co超晶格的磁畴壁能量密度σ W。为了确定σW，我们通过单独测量获得饱和磁化强度、磁畴周期和垂直磁各向异性能。利用磁畴周期和铁磁层厚度，我们首先确定了偶极长度。估计的偶极长度为约15-25 nm，这与磁化曲线随铁磁层厚度的变化非常一致。利用偶极长度和饱和磁化强度，计算出σ W = 4-7 erg/cm ~ 2。
The magnetic domain wall energy densityσWof a Ni/Co superlattice possessing perpendicular magnetic anisotropy was determined using the magnetic domain theory derived by Kooy and Enz (1960). To determineσW, we obtained the saturation magnetization, magnetic domain period, and perpendicular magnetic anisotropy energy by individual measurements. Using the magnetic domain period and the ferromagnetic layer thickness, we first determined the dipolar length. The estimated dipolar length was about 15–25 nm, which is in good agreement with the change in the magnetization curve with the ferromagnetic layer thickness. By using the dipolar length and saturation magnetization, theσWwas calculated to be 4–7 erg/cm2.