Critical length and giant magnetoimpedance in Co69Fe4.5Ni1.5Si10B15 amorphous ribbons

被引：26

作者：

Chaturvedi, Anurag ^{[1
]}

Dhakal, Tara P. ^{[1
]}

Witanachchi, Sarath ^{[1
]}

Le, Anh-Tuan ^{[2
]}

Phan, Manh-Huong ^{[1
]}

Srikanth, Hariharan ^{[1
]}

机构：

[1] Univ S Florida, Dept Phys, Tampa, FL 33620 USA

[2] Hanoi Univ Technol, Hanoi Adv Sch Sci & Technol HAST, Hanoi, Vietnam

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2010年 / 172卷 / 02期

关键词：

Amorphous ribbons; Length effect; Magnetoimpedance; Magnetic sensors; B NANOCRYSTALLINE RIBBONS; MAGNETO-IMPEDANCE; SAMPLE LENGTH; WIRES; GMI; PERMEABILITY; OPTIMIZATION; MICROWIRES; DEPENDENCE; EVOLUTION;

D O I：

10.1016/j.mseb.2010.04.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a systematic study of the influence of sample length on the giant magnetoimpedance (GMI) effect and its field sensitivity (eta) in Co69Fe4.5Ni1.5Si10B15 amorphous ribbons in the frequency range of 0.1-10 MHz. We show that there exists a critical length (L-0 similar to 8 mm) below which the maximum GMI and 17 decrease with decreasing sample length (L) and above which they increase with decreasing L. The critical frequency, at which the maximum GMI and eta are achieved, reaches the largest value for samples with L = L-0 and shifts to lower values for samples with L < L-0 and L > L-0. Our observations provide important practical guidance for optimization of the geometrical dimensions of magnetic sensing elements and design of GMI-based magnetic sensors. The demagnetization contribution for L < L-0 and the origin of the existence of L-0 and f(0) are discussed in the context of the permeability and resistance dependences of GMI. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：146 / 150

页数：5

共 26 条

[1] Giant magnetoimpedance of chemically thinned and polished magnetic amorphous ribbons [J].