Determination of external and internal demagnetizing factors for strip-like amorphous ribbon samples

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:507

Article

Varga, Lajos K.¹  Kovac, Josef²  Novak, Ladislav³ 

[1] Wigner Ctr Phys, Inst Solid State Phys & Opt, POB 49, H-1525 Budapest, Hungary

[2] Slovak Acad Sci, Inst Expt Phys, Watsonova 47, Kosice, Slovakia

[3] Tech Univ Kosice, Dept Phys, Pk Komenskeho 2, Kosice 04200, Slovakia

关键词: External;    Internal and effective demagnetizing factor;    Anhysteretic curve;    Effective anisotropy energy;    Coercive field;   

DOI  :  10.1016/j.jmmm.2020.166845

来源: Elsevier

【 摘 要 】

The extension of results concerning the calculation of the external (geometric) demagnetizing factor obtained for rod like samples to strip-like ribbon samples is investigated. To match the experimental determined demagnetizing factors of strips with various length two fitting parameters have been introduced: (i) the effective width of the strip and (2) the internal demagnetizing factor. It turned out that the equivalent rod diameter calculation from the cross-section is valid up to a limited width/thickness ratio. The experimental demagnetizing factor determined from the steepness of the anhysteretic curve was greatly reduced by a uniaxial stress; where from a lower bound for the internal demagnetizing factor could be obtained. We have found that this internal demagnetizing factor is about three times larger than the geometric one for an as cast amorphous sample with Finemet composition.

【 授权许可】

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