Origin of asymmetrical magnetoimpedance in a Co-based amorphous microwire due to dc bias current

Manh-Huong Phan, K.; Seong-Cho Yu; Cheol Gi Kim; Vázquez, Manuel
October 2003
Applied Physics Letters;10/6/2003, Vol. 83 Issue 14, p2871
Academic Journal
Permeability spectra and asymmetrical giant magnetoimpedance (AGMI) have been studied in a Co-based amorphous microwire upon the application of a dc biasing current together with a shift of axial hysteresis loops. The permeability from wall motion of core domains is nearly constant, but the permeability from rotational magnetization of shell domains increases with the bias current. AGMI and its field sensitivity are realized for the bias current due to the influence of a unidirectional bias field on wall motion in the circumferential direction. In addition, helical internal anisotropy in this microwire also plays a significant role in responding differently to the axial magnetization process and thus to AGMI. The helical residual stress is estimated to be smaller in Co-based amorphous wire than that in Fe-based amorphous wire. © 2003 American Institute of Physics.


Related Articles

  • Nanocomposite Sm2Co17/Co permanent magnets by mechanical alloying. Chen, S. K.; Tsai, J. L.; Chin, T. S. // Journal of Applied Physics;4/15/1996, Vol. 79 Issue 8, p5964 

    Prepares the mechanically alloyed magnets samarium cobalt (SmCo)[subx] using starting materials of commercial SmCo[sub5] and Co powders. Remanence enhancement for isotropic nanocomposites; Results and discussion; Magnetic hysteresis loop of mechanically alloyed SmCo[sub10].

  • Use of high direct current bias to separate electrode from bulk impedance. Cohen, Y.; Davidovich, A. // Applied Physics Letters;2/6/1995, Vol. 66 Issue 6, p706 

    Examines the separation of electrode from bulk impedance using high direct current bias. Methods for the generation of separation; Revelation of true bulk impedance; Configurations used in the impedance measurement; Negligence of electrode contribution; Presentation of experimental evidence on...

  • Contributions to giant magnetoimpedance from different domain regions of Co68.15Fe4.35Si12.5B15 amorphous wire. Mandal, K.; Sinha, S.; Anil Kumar, P. // Journal of Applied Physics;2/1/2006, Vol. 99 Issue 3, p033901 

    The frequency dependence of magnetoimpedance (MI) of amorphous wire Co68.15Fe4.35Si12.5B15 has been studied in the presence of various tensile stresses up to 285 MPa to understand the contributions to giant magnetoimpedance from different domain regions. The external stress affects MI of these...

  • Two Phase Spin Reversal Process in Co/Si/Co Trilayer Grown on GaAs(001). Islam, J.; Yamamoto, Y.; Shikoh, Eiji; Fujiwara, Akihiko; Hori, H. // European Journal of Scientific Research;Sep2007, Vol. 18 Issue 1, p45 

    Three times larger coercivity of Co/GaAs(001) bilayer compared to that of Co/Si(001) led us to fabricate a multilayer of Co/Si/Co/GaAs(001). The magnetization process of the multilayer was studied as a function of the thickness of the Si spacer layer. The coercivity of top Co layer on Si was...

  • Magnetic and structural properties of Co/CoO bilayers. Lin, X.; Hadjipanayis, G. C.; Shah, S. I. // Journal of Applied Physics;5/15/1994, Vol. 75 Issue 10, p6676 

    Presents a study that investigated the magnetic and structural properties of Co/CoO bilayers prepared by sputtering in films with cobalt thickness in the range of 65 to 250 Ã…. Depth profile for a Co/CoO sample from x-ray photoelectron spectroscopy; Coercivity versus cobalt thickness at 10...

  • Effect of microstructure on coercivity of c-axis in-plane-oriented Co/Cr multilayered films. Wang, D.; Sellmyer, D. J.; Hadjipanayis, G. C. // Journal of Applied Physics;4/15/1991, Vol. 69 Issue 8, p4541 

    Presents a study that examined the effect of the insertion of nonmagnetic chromium planes on coercivities of thin cobalt films in cobalt/chromium multilayered films. X-ray diffraction patterns of the films of cobalt; Information on the hysteresis loops of a typical film; Magnetic properties of...

  • Hysteresis, microstructure, and magneto-optical recording in Co/Pt and Co/Pd multilayers. Zeper, W. B.; van Kesteren, H. W.; Jacobs, B. A. J.; Spruit, J. H. M.; Carcia, P. F. // Journal of Applied Physics;8/15/1991, Vol. 70 Issue 4, p2264 

    Presents a study which investigated the factors that influence the coercive field H[subc] and the shape of the magnetic hysteresis loop for cobalt/platinum multilayers, applied as magneto-optical recording medium. Experimental details; Results and discussion; Conclusions.

  • Micromagnetic simulation of spin-transfer switching in a full-Heusler Co2FeAl0.5Si0.5 alloy spin-valve nanopillar. Huang, H. B.; Ma, X. Q.; Liu, Z. H.; Meng, F. Y.; Xiao, Z. H.; Wu, P. P.; Shi, S. Q.; Chen, L. Q. // Journal of Applied Physics;Aug2011, Vol. 110 Issue 3, p033913 

    We investigated the spin-transfer switching in a full-Heusler Co2FeAl0.5Si0.5 alloy spin-valve nanopillar through micromagnetic simulation. A two-step switching hysteresis loop due to the fourfold in-plane magnetocrystalline anisotropy of Co2FeAl0.5Si0.5 layers was obtained. The simulation...

  • Micromagnetic characterization of the reversal of Co/Cu/Co thin-film elements. Redjdal, M.; Ruane, M. F.; Humphrey, F. B.; Castaño, F. J.; Ross, C. A. // Journal of Applied Physics;5/15/2003, Vol. 93 Issue 10, p7933 

    The effects of aspect ratio and interlayer coupling on the switching of 50 nm wide Co(5 nm)/Cu(3 nm)/Co(2 nm) rectangular elements with aspect ratios of 10, 5.0, 2.48, and 1.52 were studied using direct integration of the Landau -- Lifshitz -- Gilbert equation. Hysteresis loops were calculated...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics