In-situ high-temperature domain structures of die-upset Nd–Fe–B magnets. (15th January 2016)

• Record Type: Journal Article
• Authors: Fang, Yikun; Yin, Xiaolu; Skomski, Ralph; Cheng, Hongsheng; Song, Kuikui; Zhu, Minggang; Guo, Zhaohui; Li, Wei; Liou, Sy-Hwang
• Is Part Of: Scripta materialia. Volume 111(2016)
• Page Start: 72
• Page End: 75
• Publication Date: 2016-01-15
• Subjects: Die-upset Nd–Fe–B magnets -- Magnetic force microscopy (MFM) -- Magnetic domains; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.08.017
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Magnetic domains of a die-upset Nd–Fe–B magnet with an energy product of about 50 MGOe are investigated by using in-situ magnetic force microscopy (MFM), varying temperature from room temperature to 240 °C. For both as-prepared and magnetized Nd–Fe–B samples, the domain-pattern evolution during thermal demagnetization is monitored by MFM. The temperature dependence of the evolution of reverse domains is explained by micromagnetic models. At all temperatures, the magnetization reversal in the technological relevant magnetized limit proceeds by nucleation. Abstract: Magnetic domains of a die-upset Nd–Fe–B magnet with an energy product of about 50 MGOe are investigated by using in-situ magnetic force microscopy (MFM), varying temperature from room temperature to 240 °C. For both as-prepared and magnetized Nd–Fe–B samples, the domain-pattern evolution during thermal demagnetization is monitored by MFM. The temperature dependence of the evolution of reverse domains is explained by micromagnetic models. At all temperatures, the magnetization reversal in the technological relevant magnetized limit proceeds by nucleation.