Constricted hysteresis loops in Fe and Ni single crystals

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:322

Article

Takahashi, Seiki^1,2  Kobayashi, Satoru^1,2  Shishido, Toetsu³ 

[1] Iwate Univ, NDE, Morioka, Iwate 0208551, Japan

[2] Iwate Univ, Ctr Sci Res, Fac Engn, Morioka, Iwate 0208551, Japan

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

关键词: Magnetic hysteresis;    Fe;    Ni;    Lattice defect;    Eddy current;   

DOI  :  10.1016/j.jmmm.2010.07.020

来源: Elsevier

【 摘 要 】

Magnetic hysteresis loops reflect the variety of magnetic domain structures and have been considered to have normal rectangular or leaf-like shapes in standard ferromagnets such as Fe and Ni metals. We report on observations of constricted hysteresis loops in Fe and Ni single crystals with very low defect densities. The constricted loops were observed below T=150 K and in a medium temperature range from 150 to 430 K in Fe and Ni single crystals, respectively. These constricted loops disappear by weak plastic deformation for both single crystals. The origin of constricted hysteresis loops was explained by eddy current effects under less domain wall pinning due to dislocations. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

Free