Abstract
A two-band s-d model based on the Green function method has been developed for calculating the conductivity and tunnel magnetoresistance of ferromagnet/insulator/ferromagnet structures. It is shown that s-d scattering at the interface between the ferromagnet and the insulator in Fe/Al2O3/Fe increases the tunnel magnetoresistance. The spin polarization of the current decreases thereby and even becomes negative, which is mainly due to scattering of strongly localized d electrons to the s band, followed by tunnelling through the insulator.
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References
S. S. P. Parkin, K. P. Roche, M. G. Samant, et al., J. Appl. Phys. 85, 5828 (1999).
J. M. McLaren, X.-G. Zhang, W. H. Butler, et al., Phys. Rev. B 59, 5470 (1999).
W. H. Butler, X.-G. Zhang, T. C. Schulthess, et al., Phys. Rev. B 63, 054416 (2001).
V. L. Moruzzi, J. F. Janak, and A. R. Williams, Calculated Electronic Properties of Metals (Pergamon, Oxford, 1978).
J. S. Moodera, T. H. Kim, C. Tanaka, et al., Philos. Mag. B 80, 195 (2000).
T. Mitsuzuka, K. Matsuda, A. Kamijo, et al., J. Appl. Phys. 85, 5807 (1999).
X. Zhang, B.-Z. Li, G. Sun, et al., Phys. Rev. B 56, 5484 (1997); F. Mointagne, M. Hehn, and A. Schuhl, Phys. Rev. B 14, 144402 (2001).
S. A. Ignatenko, A. L. Danilyuk, and V. E. Borisenko, Zh. Tekh. Fiz. 75(6), 8 (2005) [Tech. Phys. 50, 680 (2005)].
D. Bagrets, A. Bagrets, A. Vedyaev, et al., Phys. Rev. B 65, 064430 (2002).
E. Yu. Tsymbal and D. G. Pettifor, J. Phys.: Condens. Matter. 9, L411 (1997).
S. Datta, Electronic Transport in Mesoscopic Systems (Cambridge Univ. Press, Cambridge, 1995).
P. W. Anderson, Phys. Rev. 109, 1492 (1958).
J. H. Davies, The Physics of Low-Dimensional Semiconductors: An Introduction (Cambridge Univ. Press, Cambridge, 1998).
S. A. Ignatenko and V. E. Borisenko, Fiz. Tekh. Poluprovodn. (St. Petersburg) 39, 1083 (2005) [Semiconductors 39, 1048 (2005)].
M. B. Stearns, J. Magn. Magn. Mater. 5, 167 (1977).
J. S. Moodera, E. F. Gallagher, K. Robinson, et al., Appl. Phys. Lett. 70, 3050 (1997).
D. J. Monsma and S. S. P. Parkin, Appl. Phys. Lett. 77, 720 (2000).
J. M. De Teresa, A. Barthelemy, A. Fert, et al., Science 286, 507 (1999).
P. LeClair, B. Hoex, H. Wieldraaijer, et al., Phys. Rev. B 64, 100406 (2001).
P. LeClair, J. T. Kohlhepp, H. J. M. Swagten, et al., Phys. Rev. Lett. 86, 1066 (2001).
O. Gebele, M. Bohm, U. Krey, et al., J. Magn. Magn. Mater. 214, 309 (2000).
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Original Russian Text © S.A. Ignatenko, 2006, published in Zhurnal Tekhnichesko”i Fiziki, 2006, Vol. 76, No. 11, pp. 6–11.
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Ignatenko, S.A. Effect of interfacial s-d scattering on transport in structures ferromagnet/insulator/ferromagnet. Tech. Phys. 51, 1398–1404 (2006). https://doi.org/10.1134/S1063784206110028
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DOI: https://doi.org/10.1134/S1063784206110028