Effect of annealing under torsion stress on the field dependence of the impedance tensor in amorphous wires

被引:22
作者
Zhukova, VA
Chizhik, AB
Gonzalez, J
Makhnovskiy, DP [1 ]
Panina, LV
Mapps, DJ
Zhukov, AP
机构
[1] Univ Plymouth, Dept Elect Commun & Elect Engn, Plymouth PL4 8AA, Devon, England
[2] Univ Basque Country, Fac Quim, Dept Fis Mat, E-20080 San Sebastian, Spain
[3] CSIC, Inst Ciencia Mat, Madrid, Spain
[4] TAMag Iberica SL Avda, Madrid 28770, Spain
关键词
magneto-impedance effect; induced anisotropy; asymmetrical magneto-impedance effect; impedance tensor; linear sensing;
D O I
10.1016/S0304-8853(02)00552-8
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The total impedance tensor in a 120 mum-diameter (Co0.95Fe0.05)(72.5)Si12.5B15 amorphous wire subjected to annealing under torsion stress has been measured as a function of a DC axial field H-ex with the DC bias current I as a parameter. Helical magnetic anisotropy has been induced by heat treatment under torsional stress. The modification to the impedance-field characteristics caused by a DC bias current has been investigated in conjunction with the static magnetisation processes. The combination of the helical anisotropy and the DC bias field induced by a current I results in asymmetry in the static magnetic configuration. The modifications in the impedance plots due to I are of the same kind as those for the DC magnetisation loops: with increasing I the hysteresis loop becomes narrower and asymmetrical. This shows clearly that the asymmetry in the impedance-field (MI) behaviour is related to the static magnetic structure that originates from a combination of the helical anisotropy and DC circumferential field. Introducing asymmetry enhances the MI sensitivity and is also important to realise linear sensing. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:324 / 329
页数:6
相关论文
共 14 条
[1]   Influences of the helical anisotropy on the bistable behaviour of amorphous wires [J].
Aragoneses, P ;
Blanco, JM ;
Dominguez, L ;
Gonzalez, J .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1997, 168 (1-2) :177-181
[2]   Torsional stress impedance and magneto-impedance in (Co0.95Fe0.05)72.5Si12.5B15 amorphous wire with helical induced anisotropy [J].
Blanco, JM ;
Zhukov, AP ;
González, J .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1999, 32 (24) :3140-3145
[3]   Effect of tensile and torsion on GMI in amorphous wire [J].
Blanco, JM ;
Zhukov, A ;
Gonzalez, J .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 196 :377-379
[4]   ASYMMETRICAL MAGNETO-IMPEDANCE EFFECT IN TWISTED AMORPHOUS WIRES FOR SENSITIVE MAGNETIC SENSORS [J].
KITOH, T ;
MOHRI, K ;
UCHIYAMA, T .
IEEE TRANSACTIONS ON MAGNETICS, 1995, 31 (06) :3137-3139
[5]   Field-dependent surface impedance tensor in amorphous wires with two types of magnetic anisotropy: Helical and circumferential [J].
Makhnovskiy, DP ;
Panina, LV ;
Mapps, DJ .
PHYSICAL REVIEW B, 2001, 63 (14)
[6]   Measurement of field-dependent surface impedance tensor in amorphous wires with circumferential anisotropy [J].
Makhnovskiy, DP ;
Panina, LV ;
Mapps, DJ .
JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :4804-4806
[7]   Field-dependent surface impedance of a bilayer film with an antisymmetric bias magnetization [J].
Makhnovskiy, DP ;
Antonov, AS ;
Lagar'kov, AN ;
Panina, LV .
JOURNAL OF APPLIED PHYSICS, 1998, 84 (10) :5698-5702
[8]   SENSITIVE AND QUICK RESPONSE MICRO-MAGNETIC SENSOR UTILIZING MAGNETO-IMPEDANCE IN CO-RICH AMORPHOUS WIRES [J].
MOHRI, K ;
PANINA, LV ;
UCHIYAMA, T ;
BUSHIDA, K ;
NODA, M .
IEEE TRANSACTIONS ON MAGNETICS, 1995, 31 (02) :1266-1275
[9]   Mechanism of asymmetrical magnetoimpedance in amorphous wires [J].
Panina, LV ;
Mohri, K ;
Makhnovskiy, DP .
JOURNAL OF APPLIED PHYSICS, 1999, 85 (08) :5444-5446
[10]   MAGNETIZATION PROCESSES IN AMORPHOUS WIRES IN ORTHOGONAL FIELDS [J].
PANINA, LV ;
KATOH, H ;
MOHRI, K ;
KAWASHIMA, K .
IEEE TRANSACTIONS ON MAGNETICS, 1993, 29 (06) :2524-2526