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Applied Physics Letters / Volume 81 / Issue 9 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 81, 1654 (2002); http://dx.doi.org/10.1063/1.1499769 (3 pages)

Giant magnetoimpedance in trilayer structures of patterned magnetic amorphous ribbons

F. Amalou and M. A. M. Gijs

Institute of Microelectronics and Microsystems, Swiss Federal Institute of Technology Lausanne (EPFL), CH-1015 Lausanne, Switzerland

(Received 9 April 2002; accepted 17 June 2002)

We have measured the giant magnetoimpedance (GMI) and giant magnetoresistance (GMR) of Metglas®/Cu/Metglas trilayer stacks of micropatterned amorphous magnetic Metglas 2714a ribbons and Cu foils. We obtain room-temperature GMI ratios [Z(0)−Z(Hs)]/Z(Hs) up to 800%, and GMR ratios [R(0)−R(Hs)]/R(Hs) up to 2400% at frequencies of 100 kHz–10 MHz, with Hs the magnetic field in which impedance and resistance saturate towards their minimum values. These high values are a direct consequence of the large dynamic relative permeability of the magnetic ribbons and the chosen trilayer geometry. We analyze our results in the context of a theoretical model of L. V. Panina and K. Mohri [Sens. Actuators A 81, 71 (2000)]. © 2002 American Institute of Physics.

© 2002 American Institute of Physics

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KEYWORDS and PACS

Keywords

iron alloys, cobalt alloys, silicon alloys, boron alloys, metallic glasses, ferromagnetic materials, copper, amorphous magnetic materials, magnetic multilayers, giant magnetoresistance, magnetic permeability

PACS

  • 75.47.De

    Giant magnetoresistance

  • 75.70.Cn

    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

  • 75.50.Kj

    Amorphous and quasicrystalline magnetic materials

  • 75.50.Bb

    Fe and its alloys

  • 75.40.Mg

    Numerical simulation studies

  • 72.15.Gd

    Galvanomagnetic and other magnetotransport effects

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1499769

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    F. L. Machado, C. S. Martins, and B. M. Rezende, Phys. Rev. B 51, 3926 (1995).

    L. V. Panina, K. Mohri, K. Bushida, and M. Noda, J. Appl. Phys. 76, 6198 (1994)JAPIAU000076000010006198000001.

    H. Q. Guo, H. Kronmüller, T. Dragon, C. Chen, and B. G. Shen, J. Appl. Phys. 84, 5673 (1998)JAPIAU000084000010005673000001.

    F. Amalou and M. A. M. Gijs, J. Appl. Phys. 90, 3466 (2001)JAPIAU000090000007003466000001.

    S. Xiao, Y. Liu, S. Yan, Y. Dai, L. Zhang, and L. Mei, Phys. Rev. B 61, 5734 (2000).

    Y. Zhou, J. Yu, X. Zhao, and B. Cai, J. Appl. Phys. 89, 1816 (2001)JAPIAU000089000003001816000001.


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