Abstract
The conductivity of a magnetic nanocontact with a spin inhomogeneity in the form of a Ginzburg-Bulaevski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) domain wall at the center between oppositely magnetized edges is considered. The conductivity of the nanocontact is calculated in the ballistic approximation for Fe, Co, and Ni in the low-temperature limit, with allowance made for the spatial major-minor change in the electron spin energy due to exchange splitting in the edges. The calculations are carried out for the limiting cases of long and short nanocontacts. It is shown that the domain wall formed in a nanocontact causes considerable quantitative and qualitative changes in the dependence of the conductivity on the channel width.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. L. Costa-Krämer, N. García, P. García-Mochales, et al., Phys. Rev. B 55, 5416 (1997).
E. N. Bogachek, M. Jonson, R. I. Shekhter, and T. Swahn, Phys. Rev. B 50, 18341 (1994).
N. García, M. Munoz, and Y.-W. Zhao, Phys. Rev. Lett. 82, 2923 (1999).
R. P. van Gorkom, S. J. C. H. Theeuwen, K. P. Wellock, et al., J. Appl. Phys. (1999) (in press).
J. F. Bobo, H. Kikuchi, O. Redon, et al., Phys. Rev. B 60, 4131 (1999).
J. C. Slonczewski, Phys. Rev. B 39, 6995 (1989).
P. M. Levy and S. Zhang, Phys. Rev. Lett. 79, 5111 (1977).
M. Viret, D. Vignoles, D. Cole, et al., Phys. Rev. B 53, 8464 (1996).
J. F. Gregg, W. Allen, K. Ounadjela, et al., Phys. Rev. Lett. 77, 1580 (1996).
L. N. Bulaevskii and V. L. Ginzburg, Pis’ma Zh. Éksp. Teor. Fiz. 11, 272 (1970) [JETP Lett. 11 (1970)].
R. Landauer, IBM J. Res. Dev. 1, 223 (1957).
L. D. Landau and E. M. Lifshitz, Quantum Mechanics: Non-Relativistic Theory (Nauka, Moscow, 1989, 4th ed.; Pergamon, Oxford, 1977, 3rd ed.).
Author information
Authors and Affiliations
Additional information
__________
Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 71, No. 5, 2000, pp. 304–308.
Original Russian Text Copyright © 2000 by Zvezdin, Popkov.