磁性体ナノ接合部における磁壁構造の数値解析(磁性体物理・超伝導)

概要

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We demonstrate micromagnetic calculations of magnetic domain walls in nanocontacts with various dimensions H-shaped samples, and estimate the domain wall widths, which are important for domain wall scattering at nanocontacts. It is necessary to calculate the domain wall widths, since the lengths and widths of nanocontacts are varied, as are their exchange stiffness constants. The domain wall width monotonically increases as the contact width increases. Low exchange stiffness at a nanocontact leads to small domain wall width. The contact shape can be changed by changing the contact angle in order to confine the domain wall at a nanocontact: the domain wall width increases as the contact angle increases. These results imply that large domain wall scattering occurs only for nanocontacts with small effective exchange coupling between two magnetic, materials.
社団法人日本磁気学会の論文
2005-02-01