Transport characteristics of ferromagnetic single-electron transistors with non-collinear magnetizations

• Autorzy: Wiśniewska J. , Kowalik M. , Barnaś J.
• Języki publikacji: EN

Abstrakty

EN

Theoretical analysis of spin-polarized transport through a ferromagnetic single-electron transistor (FM SET) has been carried out in the sequential tunneling regime. Two external electrodes and the central part (island) of the device are assumed to be ferromagnetic, with the corresponding magnetizations being generally non-collinear. Transport properties of the FM SET are analyzed within the master equation approach, with the respective transition rates determined from the Fermi golden rule. It is assumed that spin relaxation processes on the island are sufficiently fast to neglect spin accumulation. It is shown that electric current and tunnel magnetoresistance (TMR) strongly depend on magnetic configuration of the device. Transport characteristics of symmetrical and asymmetrical structures have been calculated as a function of bias and the gate voltages.

Słowa kluczowe

EN

ferromagnetic single-electron transistor; spin-polarized transport; tunnel magnetoresistance

PL

spinowo spolaryzowany transport; magnetoopór tunelowy; ferromagnetyczny tranzystor jednoelektronowy

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2006
• Tom: Vol. 24, No. 3
• Strony: 761--767
• Opis fizyczny: Bibliogr. 8 poz.

Twórcy

autor

Wiśniewska J.

autor

Kowalik M.

autor

Barnaś J.

• Institute of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań,

Bibliografia

• [1] BARNAŚ J., FERT A., Phys. Rev. Lett., 80 (1998), 1058.
• [2] TAKAHASHI S., MAEKAWA S., Phys. Rev. Lett., 80 (1998), 1758.
• [3] BARNAŚ J., DUGAEV V., KROMPIEWSKI S., MARTINEK J., RUDZIŃSKI W., ŚWIRKOWICZ R., WEYMANN I., WILCZYŃSKI M., Phys. Stat. Sol. (b), 236 (2003), 246.
• [4] WEYMANN I., BARNAŚ J., Phys. Stat. Sol. (b), 236 (2003), 651.
• [5] WIŚNIEWSKA J., WEYMANN I., BARNAŚ J., Mater. Sci.-Poland, 22 (2004), 461.
• [6] GRABERT H., DEVORET M.H., Single Charge Tunneling, NATO ASI Series, Vol. 294, Plenum Press, New York, 1992.
• [7] AMMAN M., WILKINS R., BEN-JACOB E., MAKER P.D., JAKLEVIC R.C., Phys. Rev. B, 43 (1991), 1146.
• [8] JULLIERE M., Phys. Lett. A, 54 (1975), 225.