Magnetic and magnetoresistive properties of CoFe/Au/Co/Au multilayered structures

• Autorzy: Szymański B. , Urbaniak M. , Stobiecki F.
• Konferencja: New Materials for Magnetoelectronics MAG-EL-MAT 2007, Będlewo near Poznań, 7-10 May 2007
• Języki publikacji: EN

Abstrakty

EN

Sputter deposited (Co90Fe10 tCoFe/Au 2.7nm/Co 0.6nm/Au 2.7nm)10 multilayers with tCoFe in the 0.4-3.0 nm range were investigated. Magnetic reversal M(H) and magnetoresitance R(H) curves were measured. For tCoFe ??1.2 nm, the R(H) characteristics are similar to that of the prototype system (NiFe/Au/Co/Au), i.e. the system characterized by alternating in plane (NiFe) and out-of-plane (Co) magnetic anisotropy. However, for smaller tCoFe, the effective anisotropy of CoFe layers switches from the in-plane anisotropy to the perpendicular one. This transition is a reason of a strong decrease of the GMR amplitude for tCoFe 1.2 nm. The relatively large values of GMR amplitude (? 7%) and saturation field (900 kA/m) were obtained for sample with tCoFe = 3 nm, measured in perpendicular field configuration. The result indicates a distinct improvement of parameters important for application of studied films as magnetoresistive sensors characterized by the linear R(H) dependence in a broad range of magnetic field.

Słowa kluczowe

EN

magnetic multilayers; perpendicular magnetic anisotropy; GMR sensor

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2007
• Tom: Vol. 25, No. 4
• Strony: 1275--1279
• Opis fizyczny: Bibliogr. 5 poz.

Twórcy

autor

Szymański B.

autor

Urbaniak M.

autor

Stobiecki F.

• Institute of Molecular Physics, Polish Academy of Sciences, ul. Smoluchowskiego 17, 60-179 Poznań, Poland

Bibliografia

• [1] STOBIECKI F., SZYMAŃSKI B., LUCIŃSKI T., DUBOWIK J., URBANIAK M., RÖLL K., J. Magn. Magn. Mater., 282 (2004), 32.
• [2] SZYMAŃSKI B., STOBIECKI F., URBANIAK M., J. Alloy Compd., 423 (2006), 236.
• [3] URBANIAK M., STOBIECKI F., SZYMAŃSKI B., EHRESMANN A., MAZIEWSKI A., TEKIELAK M., J. Appl. Phys., 101 (2007), 013905.
• [4] CHAPPERT C., LE DANG K., BEAUVILLAIN P., HURDEQUINT H., RENARD D., Phys. Rev. B, 34 (1986), 3192.
• [5] LUCIŃSKI T., J. Magn. Magn. Mater., 219 (2000), 303.