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

被引：19
作者：
Alayo, W. [1 ]
Xing, Y. T. [1 ]
Baggio-Saitovitch, E. [1 ]
机构：
[1] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil
来源：
JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 11期
关键词：
antiferromagnetic materials; cobalt; exchange interactions (electron); ferromagnetic materials; iridium alloys; magnetic anisotropy; magnetic hysteresis; magnetic multilayers; manganese alloys; Permalloy; ruthenium; spin valves; MAGNETORESISTANCE;
D O I：
10.1063/1.3257113
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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 A degrees, and the thicknesses of the other layers were keep constant, resulting in multilayers with a strong exchange bias field (H-eb) 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 H-eb 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.
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页数：6
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共 11 条
  • [1] GIANT MAGNETORESISTANCE IN SOFT FERROMAGNETIC MULTILAYERS
    DIENY, B
    SPERIOSU, VS
    PARKIN, SSP
    GURNEY, BA
    WILHOIT, DR
    MAURI, D
    [J]. PHYSICAL REVIEW B, 1991, 43 (01): : 1297 - 1300
  • [2] Magnetoresistive sensors
    Freitas, P. P.
    Ferreira, R.
    Cardoso, S.
    Cardoso, F.
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2007, 19 (16)
  • [3] Rotatable anisotropy and coercivity in exchange-bias bilayers
    Geshev, J
    Pereira, LG
    Schmidt, JE
    [J]. PHYSICAL REVIEW B, 2002, 66 (13) : 1 - 8
  • [4] Exchange bias through a Cu interlayer in an IrMn/Co system
    Geshev, J.
    Nicolodi, S.
    Pereira, L. G.
    Nagamine, L. C. C. M.
    Schmidt, J. E.
    Deranlot, C.
    Petroff, F.
    Rodriguez-Suarez, R. L.
    Azevedo, A.
    [J]. PHYSICAL REVIEW B, 2007, 75 (21)
  • [5] Effect of finite magnetic film thickness on Neel coupling in spin valves
    Kools, JCS
    Kula, W
    Mauri, D
    Lin, T
    [J]. JOURNAL OF APPLIED PHYSICS, 1999, 85 (08) : 4466 - 4468
  • [6] Analytical expressions for the magnetization curves of a magnetic-tunnel-junction-like system
    Layadi, A.
    [J]. JOURNAL OF APPLIED PHYSICS, 2006, 100 (08)
  • [7] Oscillatory interlayer exchange coupling in Ni81Fe19/Cu/Ni81Fe19Fe50Mn50 spin valves
    Leal, JL
    Kryder, MH
    [J]. JOURNAL OF APPLIED PHYSICS, 1996, 79 (05) : 2801 - 2803
  • [8] Magnetoresistance and magnetization studies through a Cu interlayer in spin valves of NiFe/Cu/NiFe/FeMn
    Nagamine, L. C. C. M.
    Castro, G. M. B.
    Geshev, J.
    Baibich, M. N.
    Saitovitch, E. B.
    Schmidt, J. E.
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2008, 320 (14) : E16 - E18
  • [9] Exchange bias in nanostructures
    Nogués, J
    Sort, J
    Langlais, V
    Skumryev, V
    Suriñach, S
    Muñoz, JS
    Baró, MD
    [J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2005, 422 (03): : 65 - 117
  • [10] Interplay between magnetic interactions in spin-valve structures
    Rodriguez-Suarez, R. L.
    Oliveira, A. B.
    Rezende, S. M.
    Azevedo, A.
    [J]. JOURNAL OF APPLIED PHYSICS, 2006, 99 (08)
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