ブロッホ壁

Bloch wall

[目次：結晶等(結晶構造／材料試料)]

磁極の向きが互いに180°変わる磁区の境界の構造の一種。磁壁に平行な面内で磁化が徐々に回転して隣の磁区につながる。厚さ100nm以上のバルク試料でとる磁壁構造。磁壁の厚さは鉄で50nm程度。磁壁を含む二つの磁区からの電子回折図形を見ると、二つの磁区からの回折斑点を結ぶ直線上に磁壁部分からのディフューズな強度が現れる。

"Bloch wall" is one type of the boundary structure of magnetic domains whose magnetization directions are antiparallel or are different by 180°to each other. The magnetic dipoles continuously rotate in planes parallel to the magnetic boundary and finally connect to those at the adjacent magnetic domain with opposite magnetization. This structure is formed in a bulk specimen with a thickness of more than 100 nm. The thickness of the Bloch wall is about 50 nm for iron. In a diffraction pattern formed by two adjacent magnetic domains containing a Bloch wall, a diffuse intensity line appears connecting the diffraction spots from the two domains.

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