This research delves into controlling the interplay of magnetostatic field and anisotropy field via controlled composition distribution,thereby boosting coercivity in Nd-Ce-Fe-B magnets.As the originally heterogeneous...This research delves into controlling the interplay of magnetostatic field and anisotropy field via controlled composition distribution,thereby boosting coercivity in Nd-Ce-Fe-B magnets.As the originally heterogeneous compositions gradually homogenize within the magnet,an interesting trend in coercivity emerges.Initially,coercivity shows a positive trend,increasing as the components start to blend.However,after reaching an optimal point,it begins to decline.Notably,coercivity peaks once the element Ce permeates to the magnet's surfaces.This phenomenon is closely associated with changes in the H_(crit) distribution.H_(crit) is a measure that reflects the interaction between anisotropy field and magnetostatic field.When the composition becomes more uniform,the distribution of H_(crit) shifts,and its minimum absolute value varies.These changes are driven by the combined influence of anisotropy field and magnetostatic field.Understanding these relationships provides valuable insights.It opens up new avenues for enhancing coercivity in Nd-Ce-Fe-B magnets by adjusting and fine-tuning the interactions between these fields.展开更多
基金financially supported by the National Key Research and Development Program of China(Nos.2022YFB3505200 and 2023YFB3507000)Inner Mongolia Northern Rare Earth Advanced Materials Technology Innovation Co.,Ltd.Project(No.CXZX-B-202304-0004)
文摘This research delves into controlling the interplay of magnetostatic field and anisotropy field via controlled composition distribution,thereby boosting coercivity in Nd-Ce-Fe-B magnets.As the originally heterogeneous compositions gradually homogenize within the magnet,an interesting trend in coercivity emerges.Initially,coercivity shows a positive trend,increasing as the components start to blend.However,after reaching an optimal point,it begins to decline.Notably,coercivity peaks once the element Ce permeates to the magnet's surfaces.This phenomenon is closely associated with changes in the H_(crit) distribution.H_(crit) is a measure that reflects the interaction between anisotropy field and magnetostatic field.When the composition becomes more uniform,the distribution of H_(crit) shifts,and its minimum absolute value varies.These changes are driven by the combined influence of anisotropy field and magnetostatic field.Understanding these relationships provides valuable insights.It opens up new avenues for enhancing coercivity in Nd-Ce-Fe-B magnets by adjusting and fine-tuning the interactions between these fields.
