Magnetization studies in IrMn/Co/Ru/NiFe spin valves with weak interlayer coupling

Alayo, W.; Xing, Y. T.; Baggio-Saitovitch, E.
December 2009
Journal of Applied Physics;Dec2009, Vol. 106 Issue 11, p113903
Academic Journal
The magnetic interactions in the Ir20Mn80/Co/Ru/Py (Py=Ni81Fe19) spin valve structures have been studied by magnetization measurements. The Ru thickness was varied between 24 and 58 Ã…, and the thicknesses of the other layers were keep constant, resulting in multilayers with a strong exchange bias field (Heb) and weak oscillatory interlayer coupling. The bilinear and biquadratic coupling constants between Co and Py and the exchange anisotropy at the IrMn/Co interface were considered for modeling the magnetic hysteresis loops of the whole system. The interplay between these interactions gives rise to an increase (decrease) in the Heb value of the Co pinned layer for antiferromagnetic (ferromagnetic) interlayer coupling, if compared to the system with no interlayer coupling, and in a small exchange anisotropy field, proportional to the bilinear coupling energy, induced to the Py free layer.


Related Articles

  • Generalized Stoner-Wohlfarth model accurately describing the switching processes in pseudo-single ferromagnetic particles. Cimpoesu, Dorin; Stoleriu, Laurentiu; Stancu, Alexandru // Journal of Applied Physics;Dec2013, Vol. 114 Issue 22, p223901 

    We propose a generalized Stoner-Wohlfarth (SW) type model to describe various experimentally observed angular dependencies of the switching field in non-single-domain magnetic particles. Because the nonuniform magnetic states are generally characterized by complicated spin configurations with no...

  • Magnetic and electrical properties of cation-substituted sulfides Me xMn1 − xS ( Me = Co, Gd). Aplesnin, S. S.; Ryabinkina, L. I.; Romanova, O. B.; Sokolov, V. V.; Pichugin, A. Yu.; Galyas, A. I.; Demidenko, O. F.; Makovetskiĭ, G. I.; Yanushkevich, K. I. // Physics of the Solid State;Apr2009, Vol. 51 Issue 4, p698 

    The temperature dependences of the specific magnetization σ and the electrical resistivity ρ of Me xMn1 − xS single crystals ( Me= Co, Gd; x= 0.05) have been studied in the temperature range 80 K < T < 1000 K. The samples under study have revealed the presence of a spontaneous...

  • Interrelation of the magnetic structure and the band insulating state in doped manganites. Dunaevsky, S. M.; Deriglazov, V. V. // Physics of the Solid State;May2010, Vol. 52 Issue 5, p904 

    The interrelation between the magnetic structure and the band insulating state in doped La1 − xCa xMnO3 manganites has been discussed. An analysis of various zigzag chains has revealed that, in the one-dimensional spectrum of e g electrons of these compounds, there always appear a number...

  • The magnetoelastic mechanism of singlet phase formation in a two-dimensional quantum antiferromagnet. Val'kov, V. V.; Mitskan, V. A.; Petrakovskiĭ, G. A. // Journal of Experimental & Theoretical Physics;Feb2006, Vol. 102 Issue 2, p234 

    A model describing the second-order phase transition with respect to the magnetoelastic coupling parameter from the antiferromagnetic (AFM) to the singlet state in a two-dimensional quantum magnet on a square lattice is proposed. The spectrum of elementary excitations in the singlet and AFM...

  • Anomalous specific heat of charge-ordered La0.5Ca0.5MnO3. Xian-Sheng, Cao; Chang-Le, Chen; Tong-Li, Wei; Guo-Mian, Gao // Journal of Applied Physics;Aug2009, Vol. 106 Issue 3, p033707 

    An exact treatment of the double exchange-Holstein model with an electron-phonon interaction γ coupled to magnetism is used to compute the heat capacity. The model is performed combining a mean-field approximation for the double exchange interaction and the Lang–Firsov transformation...

  • The jump phenomenon in the angular dependence of exchange bias for ferromagnetic/antiferromagnetic bilayers. Bai, Yuhao; Yun, Guohong; Bai, Narsu // Journal of Applied Physics;Sep2009, Vol. 106 Issue 6, p063919 

    Based on the principle of minimal energy, the angular dependence of exchange bias for ferromagnetic/antiferromagnetic bilayers has been investigated in detail. The competition between unidirectional and uniaxial anisotropies divides the initial magnetization state of the bilayer into monostable...

  • The magnetic structure of exchange coupled FePt/FePt3 thin films. Couet, S.; Demeter, J.; Menéndez, E.; Rüffer, R.; Kinane, C. J.; Laenens, B.; Teichert, A.; Tripathi, S.; Almeida, F.; Vantomme, A.; Temst, K. // Journal of Applied Physics;Jan2013, Vol. 113 Issue 1, p013909 

    We present a study of the magnetic structure of an exchange biased FePt/FePt3 bilayer system. By combining nuclear resonant scattering and polarized neutron reflectometry on the same sample, we are able to assess the magnetic ground state of both the ferromagnetic (F) FePt and antiferromagnetic...

  • Continuously variable glazing. Schachter, K. // Popular Science;Nov89, Vol. 235 Issue 5, p74 

    Looks at a technology called suspended-particle light-valve glazing, presently being tested in sunglasses. Users turn a dial and the glass darkens or turn it back and the glass clears. Outlines research on SPDs (suspended-particle displays) and possible uses. INSET: The particulars on SPDs..

  • CERN's LEP makes its first zeds. Pease, R. // Nature;8/17/1989, Vol. 340 Issue 6234, p495 

    Reports on the production of the first Z to the power of 0 particles at the new Large Electron-Positron collider (LEP) at CERN (European Laboratory for Particle Physics). Z to the power of 0 at other facilities; Detection rate.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics