Polarized neutron reflectivity studies on granular Co80Fe20/Al2O3 multilayers

被引：3
作者：
Bedanta, S.
Kentzinger, E.
Petracic, O.
Kleemann, W.
Ruecker, U.
Paul, A.
Brueckel, Th.
Cardoso, S.
Freitas, P. P.
机构：
[1] Univ Duisburg Essen, Angew Phys, D-47048 Duisburg, Germany
[2] Forschungszentrum, Inst Festkorperphys, D-52425 Julich, Germany
[3] Imperial Coll London, Dept Phys, London SW7 2AZ, England
[4] INESC, P-1000 Lisbon, Portugal
来源：
PHYSICA B-CONDENSED MATTER | 2007年 / 397卷 / 1-2期
关键词：
polarized neutron reflectometry; magnetic thin films; dipolar coupling; magnetization reversal mechanisms;
D O I：
10.1016/j.physb.2007.02.066
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Polarized neutron reflectivity (PNR) studies have been performed on granular multilayers [Co80Fe20(t(n))/Al2O3 (3nm)](m). For a non-percolating superferromagnetic (SFM) sample (t(n) = 1.3 nm) no spin-flip (SF) scattering was observed, measured at various points of the hysteresis, confirming that the magnetization reversal is achieved merely by domain nucleation and growth. For a percolated sample (t(n) = 1.6 nm) an oscillating magnetization depth profile from FeCo layer to FeCo layer along the multilayer stack was observed around the coercive field. The competition between long-range dipolar, short-range Neel and external field interactions apparently give rise to such a modulated magnetization depth profile in these magnetic multilayers. (c) 2007 Elsevier B.V. All rights reserved.
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收藏
页码：65 / 67
页数：3
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