Abstract
This paper describes a theoretical study, at a microscopic scale, of the properties of a symmetric magnetic nanocontact. In particular, we study a symmetric nanocontact separating two waveguide groups of semi-infinite spin ordered ferromagnetic monatomic chains. The individual and total conductance of bulk magnons of the chains, scattering coherently at the nanocontact, and the localised density of spin states in the nanocontact domain, are calculated and analysed. The inter-atomic magnetic exchange is varied on the nanocontact to investigate the consequences of magnetic softening and hardening for the calculated properties. Transmission and reflection scattering cross sections are calculated from elements of a Landauer type scattering matrix. The results highlight the localized spin states on the nanocontact domain and their interactions with incident magnons. The results demonstrate also the magnetic and symmetry properties of the nanocontact domain.
References
V. Shchukin, D. Bimberg, Rev. Mod. Phys. 71, 1125 (1999)
B. Gambardella, M. Blanc, L. Burgi, K. Kuhnke, K. Kern, Surf. Sci. 449, 93 (2000)
K. Kern, H. Niehaus, A. Schatz, P. Zeppenfeld, J. Goerge, G. Comsa, Phys. Rev. Lett. 67, 855 (1991)
S. Rousset et al., Materials Sc. Eng. B 96, 169 (2002)
P. Gambardella, A. Dallmeyer, K. Maiti, M.C. Malagoli, S. Rusponi, P. Ohresser, W. Eberhardt, C. Carbone, K. Kern, Phys. Rev. Lett. 93, 077203 (2004)
A. Vindigni, A. Rettori, M.G. Pini, C. Carbone, P. Gambardella, Appl. Phys. A 82, 385 (2006)
N. Weiss, T. Cren, M. Epple, S. Rusponi, G. Baudot, A. Tejeda, V. Repain, S. Rousset, P. Ohresser, F. Scheurer, P. Bencok, H. Brune, Phys. Rev. Lett. 95, 157204 (2005)
J.N. Crain, D.T. Pierce, Science 7, 703 (2005)
L. Bürgi, O. Jeandupeux, A. Hirstein, H. Brune, K. Kern, Phys. Rev. Lett. 81, 5370 (1998)
Y. Hasegawa, P. Avouris, Phys. Rev. Lett. 71, 1071 (1993)
J. Repp, G. Meyer, K.H. Rieder, Phys. Rev. Lett. 92, 036803 (2004)
R. Landauer, IBM J. Res. Dev. 1, 223 (1957); R. Landauer, Philos. Mag. 21, 863 (1970)
M. Büttiker, Phys. Rev. Lett. 57, 1761 (1986)
E. Tekman, P.F. Bagwell, Phys. Rev. B 48, 2553 (1993)
C. Berthod, F. Gagel, K. Maschke, Phys. Rev. B 50, 18 299 (1994)
A. Fellay, F. Gagel, K. Maschke, A. Virlouvet, A. Khater, Phys. Rev. B 55, 1707 (1997)
M. Belhadi, A. Khater, O. Rafil, J. Hardy, R. Tigrine, Phys. Stat. Sol. B 228, 685 (2001)
A. Khater, M. Abou Ghantous, Surf. Sci. Lett. 498, L97 (2002)
Y. Imry, Introduction to Mesoscopic Physics (Oxford University Press, Oxford, 1997)
F. Schütz, M. Kollar, P. Kopietz, Phys. Rev. Lett. 91, 017205 (2003)
A. Dhar1, B.S. Shastry, Phys. Rev. B 67, 195405 (2003)
Y. Imry, O. Entin-Wohlman, A. Aharony, Europhys. Lett. 72, 263 (2005)
M. Abou Ghantous, A. Khater, Eur. Phys. J. B 12, 335 (1999)
T.E. Feuchtwang, Phys. Rev. 155, 731 (1967)
J. Szeftel, A. Khater, J. Phys. C: Solid State Phys. 20, 4725 (1987)
M. Belhadi, O. Rafil, R. Tigrine, A. Khater, J. Hardy, A. Virlouvet, K. Maschke, Eur. Phys. J. B 15, 435 (2000)
H. Grimech, A. Khater, Surf. Sci. 323, 198 (1995)
A.R.P. Rau, Physica Scripta 69, 1 (2004)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Bourahla, B., Khater, A. & Tigrine, R. Dynamic properties of a symmetric spin nanocontact. Eur. Phys. J. B 69, 343–349 (2009). https://doi.org/10.1140/epjb/e2009-00175-6
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1140/epjb/e2009-00175-6