Ultrahigh coercivity and core–shell microstructure achieved in oriented Nd–Fe–B thin films diffusion-processed with Dy-based alloys

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• 作者：Tongbo Zhang ; Xiaoqian Zhou ; Dedong Yu ; Yanqing Fu ; Guojian Li…
• 刊名：Applied Physics A
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：123
• 期：1
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Condensed Matter Physics; Optical and Electronic Materials; Nanotechnology; Characterization and Evaluation of Materials; Surfaces and Interfaces, Thin Films; Operating Procedures, Materials Treatment
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-0630
• 卷排序：123

文摘

Ultrahigh ambient coercivities of ~4 T were achieved in Nd–Fe–B benchmark thin film with coercivity of 1.06 T by diffusion-processing with Dy, Dy₇₀Cu₃₀ and Dy₈₀Ag₂₀ alloy layer. High texture and good squareness were obtained. In triple-junction regions, Dy element was found to be immiscible with Nd element. Microstructure observation indicated the typical gradient elementary distribution. Unambiguous core/shell microstructure was characterized by transition electron microscopy. Due to the enhanced ambient coercivity, the coercivity temperature stability was also substantially increased.