Domain structure of hard magnetic NdAlFeCo bulk metallic glass

Magnetic domain structure of hard magnetic Nd60Al10Fe20Co10 bulk metallic glass (BMG) has been studied by using magnetic force microscopy. In the magnetic force images it is shown that the exchange interaction type magnetic domains with a period of about 360 nm do exist in the BMG, which is believed...

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Bibliographic Details
Published inChinese science bulletin Vol. 46; no. 19; pp. 1595 - 1597
Main Authors Wei, Bingchen, Wang, Weihua, Pan, Mingxiang, Han, Baoshan, Zhang, Zhenrong, Hu, Wenrui
Format Journal Article
LanguageEnglish
Published Beijing Springer Nature B.V 01.10.2001
Subjects
Amorphous materials
Atomic clusters
Coercivity
Crystallization
Ferromagnetism
Image contrast
Magnetic domains
Magnetic force microscopy
Magnetic properties
Metallic glasses
Paramagnetism
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Summary:Magnetic domain structure of hard magnetic Nd60Al10Fe20Co10 bulk metallic glass (BMG) has been studied by using magnetic force microscopy. In the magnetic force images it is shown that the exchange interaction type magnetic domains with a period of about 360 nm do exist in the BMG, which is believed to be associated with the appearance of hard-magnetic properties in this system. As the scale of the magnetic domain is much larger than the size of the short-range ordered atomic clusters existing in the BMG, it is believed that the large areas of magnetic contrast are actually a collection of a group of clusters aligned in parallel by strong exchange coupling interaction. After fully crystallization, the BMG exhibits paramagnetism. No obvious magnetic contrast is observed in the magnetic force images of fully crystallized samples, except for a small quantity of ferromagnetic crystalline phase with low coercivity and an average size of 900 nm.
ISSN:1001-6538
2095-9273
1861-9541
2095-9281
DOI:10.1007/BF02900613