The Domain Structure of Die-Upset Anisotropic Magnet Based On Nd-(Fe, Co)-B Alloy

Archives of Metallurgy and Materials

P. Wieczorek¹  D. Derewnicka-Krawczyńska²  U. Kotlarczyk³  M. Dośpial³  D. Płusa³ 

[1] Institute of Material Science Engineering, Czestochowa University of Technology, 42-200 Cz?stochowa, 19 Armii Krajowej Str., Poland;Institute of Precision Mechanics, 01-796 Warsaw, 3 Duchnicka Str., Poland;Institute of physics, Czestochowa University of Technology, 42-200 cz?stochowa, 19 armii krajowej str., Poland

关键词: Keywords: exchange interactions;    high coercivity materials;    permanent magnets;    domain walls and domain structure;    magnetization reversal mechanisms;   

DOI  :  10.2478/v10172-011-0018-8

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The measurements of the recoil curves for the die-upset Nd-(Fe, Co)-B based magnets from different points on the magnetization and demagnetization curves have been carried out by means of the LakeShore vibrating sample magnetometer in an applied magnetic fields up to 2 T. From the recoil curves the so-called Wohlfarth's remanence relationship has been derived. From this it was deduced that the magnetic interaction existing between the magnet grains has a dipolar nature. The existence of the magnetic interaction has been confirmed by magnetic domain observations by using the magnetic force microscopy (MFM). In the area of interaction domains there is the fine scale magnetic contrast resulting from the dipolar interaction between neighboring grains.

【 授权许可】

Unknown