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2006 | 4 | 3 | 331-340

Article title

Simulating a perpendicular exchange-biased structure with a partially covering nonmagnetic insertion at the FM/AFM interface


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The existence of minority spins, opposite to the perpendicular exchange bias, and majority spins aligned with this bias, and the dependence of the perpendicular exchange-bias field on the imprint effect, caused by the partially covering spacer at the ferromagnetic/antiferromagnetic (FM/AFM) interface, have been studied using Ising-type simulations. The present investigation suggests that the main factors influencing this phenomenon were dependent on the FM/AFM interface morphology, the balance between FM/AFM coupling and the FM-spins coupling, and the numerical balance between minority and majority spins. It was also determined that the imprint phenomenon can be used to enhance the perpendicular exchange-bias for small partial insertions at the FM/AFM interface.










Physical description


1 - 9 - 2006
1 - 9 - 2006


  • Department of Electron Technology, Institute of Physics, Silesian University of Technology, 44-100, Gliwice, Poland


  • [1] S. van Dijken, M. Zołądź, M. Czapkiewicz and T. Stobiecki: “Asymmetric magnetization reversal in exchange-biased Co/Pt multilayers”, Phys. Stat. Solid. B, Vol. 243, (2006), pp. 169–173. http://dx.doi.org/10.1002/pssb.200562498[Crossref]
  • [2] K. Tanahashi, A. Kikukawa, N. Shimizu and Y. Hosoe: “Reduction of spike noise in perpendicular recording media by using MnIr antiferromagnetic films”, J. Appl. Phys., Vol. 91, (2002), pp. 8049–8051. http://dx.doi.org/10.1063/1.1454981[Crossref]
  • [3] M. Belmeguenai, T. Devolder and C. Chappert: “Precessional switching on exchange biased patterned magnetic media with perpendicular anisotropy”, J. Appl. Phys., Vol. 97, (2005), pp. 83903–83909. http://dx.doi.org/10.1063/1.1868057[Crossref]
  • [4] F. Garcia, F. Fettar, S. Auffret, B. Rodmacq and B. Dieny: “Exchange-biased spin valves with perpendicular magnetic anisotropy based on (Co/Pt) multilayers”, J. Appl. Phys., Vol. 93, (2003), pp. 8397–8399. http://dx.doi.org/10.1063/1.1558096[Crossref]
  • [5] L. Sun, S.M. Zhou, P.C. Searson and C.L. Chien: “Longitudinal and perpendicular exchange bias in FeMn/(FeNi/FeMn)n multilayers”, J. Appl. Phys., Vol. 93, (2003), pp. 6841–6843. http://dx.doi.org/10.1063/1.1544447[Crossref]
  • [6] J. Sort, V. Baltz, F. Garcia, B. Rodmacq and B. Dieny: “Tailoring perpendicular exchange bias in [Pt/Co]-IrMn multilayers”, Phys. Rev. B, Vol. 71, (2005), art. 054411.
  • [7] S. van Dijken, J. Moritz and J.M.D. Coey: “Correlation between perpendicular exchange bias and magnetic anisotropy in IrMn/[Co/Pt]n and [Pt/Co]n/IrMn multilayers”, J. Appl. Phys., Vol. 97, (2005), pp. 63907–63911. http://dx.doi.org/10.1063/1.1861964[Crossref]
  • [8] S. van Dijken, M. Besnier, J. Moritz and J.M.D. Coey: “IrMn as exchange-biasing material in systems with perpendicular magnetic anisotropy”, J. Appl. Phys., Vol. 97, (2005), pp. 10K114–10K117. http://dx.doi.org/10.1063/1.1855699
  • [9] F. Garcia, G. Casali, S. Auffret, B. Rodmacq and B. Dieny: “Exchange bias in (Pt/Co0.9Fe0.1)n/FeMn multilayers with perpendicular magnetic anisotropy”, J. Appl. Phys., Vol. 91, (2002), pp. 6905–6907. http://dx.doi.org/10.1063/1.1447870
  • [10] F. Garcia, J. Sort, B. Rodmacq, S. Auffret and B. Dieny: “Large anomalous enhancement of perpendicular exchange bias by introduction of a nonmagnetic spacer between the ferromagnetic and antiferromagnetic layers”, Appl. Phys. Lett., Vol. 83, (2003), pp. 3537–3539. http://dx.doi.org/10.1063/1.1619562[Crossref]
  • [11] J. Sort, F. Garcia, B. Rodmacq, S. Auffret and B. Dieny: “Enhancement of exchange bias through a non-magnetic spacer”, J. Magnet. Magnetic Mat., Vol. 272–276, (2004), pp. 355–356. http://dx.doi.org/10.1016/j.jmmm.2003.12.587[Crossref]
  • [12] X. Illa, E. Vives and A. Planes: “Metastable random-field Ising model with exchange enhancement: A simple model for exchange bias”, Phys. Rev. B, Vol. 66, (2002), art. 224422. [Crossref]
  • [13] T. Błachowicz: “Analysis of numerical limits in 2-D simulations of a ferromagnetic/antiferromagnetic interface using the random field Ising model”, Centr. Eur. J. Phys., Vol. 3, (2005), pp. 147–162.
  • [14] F. Ernult, B. Dieny, L. Billard, F. Lançon and J.R. Regnard: “Increase in ferromagnetic/antiferromagnetic exchange bias due to reduction of the interfacial exchange interaction”, J. Appl. Phys., Vol. 94, (2003), pp. 6678–6682. http://dx.doi.org/10.1063/1.1614867[Crossref]
  • [15] B. Beschoten, A. Tillmanns, J. Keller, G. Güntherodt, U. Nowak and K.D. Usadel: “Domain State Model for Exchange Bias: Influence of Structural Defects on Exchange Bias in Co/CoO”, Adv. Solid State Phys., Vol. 42, (2002), pp. 419–431.
  • [16] T. Mewes, R. Lopusnik, J. Fassbender, B. Hillebrands, M. Jung, D. Engel, A. Ehresmann and H. Schmoranzer: “Suppression of exchange bias by ion irradiation”, Appl. Phys. Lett., Vol. 76, (2000), pp. 1057–1059. http://dx.doi.org/10.1063/1.125937[Crossref]

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