Improved soft magnetic properties in nanocrystalline FeCuNbSiB Nanophy® cores by intense magnetic field annealing

被引：23

作者：

Madugundo, Rajasekhar ^{[1
,2
,3
]}

Geoffroy, Olivier ^{[1
,2
,3
]}

Waeckerle, Thierry ^{[4
]}

Frincu, Bianca ^{[1
,2
]}

Kodjikian, Stephanie ^{[1
,2
]}

Rivoirard, Sophie ^{[1
,2
]}

机构：

[1] Univ Grenoble Alpes, Inst NEEL, F-38000 Grenoble, France

[2] CNRS, Inst NEEL, F-38000 Grenoble, France

[3] Grenoble Elect Engn Lab G2Elab, Batiment GreEn ER,21 Ave Martyrs, F-38031 Grenoble, France

[4] Aperam Res Ctr, F-58160 Imphy, France

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2017年 / 422卷

关键词：

Magnetic field annealing; Nanophy (R); Magnetic field induced anisotropy; Pair ordering; SI-B ALLOYS; GRAIN-STRUCTURE; ANISOTROPY;

D O I：

10.1016/j.jmmm.2016.09.063

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of high external magnetic field (up to 7 T) on soft magnetic properties in nanocrystalline Fe741Si15.7Nb3.1B6.1Cu1 Nanophy((R)) cores has been investigated. The as-quenched amorphous ribbons were nanocrystallized by annealing between 540 and 620 degrees C in transverse magnetic field. By varying annealing field from 0 to 7 T, induced anisotropy ranging from as low as 4 J/m(3) to as high as 41 J/m(3) is obtained. It is responsible for an increase in the cut-off frequency up to 300 kHz when the material is submitted to dynamic magnetic excitations. A minimum coercivity of 0.74 A/m is observed in the core annealed in 1 T associated to low losses. The relative permeability decreases on increasing the annealing field intensity with a minimum value of 13,654 at 7 T. Such permeability level opens the way to new applications of the Nanophy r alloys.

引用

页码：475 / 478

页数：4

共 23 条

[1] Influence of microstructure on the enhancement of soft magnetic character and the induced anisotropy of field annealed HITPERM-type alloys [J].