Polarized neutron reflectivity studies on granular Co80Fe20/Al2O3 multilayers

S. Bedanta; E. Kentzinger; O. Petracic; W. Kleemann; U. Rücker; A. Paul; Th Brückel; S. Cardoso; P. P. Freitas

doi:10.1016/j.physb.2007.02.066

Polarized neutron reflectivity studies on granular Co₈₀Fe₂₀/Al₂O₃ multilayers

S. Bedanta^*, E. Kentzinger, O. Petracic, W. Kleemann, U. Rücker, A. Paul, Th Brückel, S. Cardoso, P. P. Freitas

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Polarized neutron reflectivity (PNR) studies have been performed on granular multilayers [Co₈₀Fe₂₀(t_n)/Al₂O₃ (3 nm)]_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 Néel and external field interactions apparently give rise to such a modulated magnetization depth profile in these magnetic multilayers.

Original language	English
Pages (from-to)	65-67
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	397
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physb.2007.02.066
State	Published - 15 Jul 2007
Externally published	Yes

Keywords

Dipolar coupling
Magnetic thin films
Magnetization reversal mechanisms
Polarized neutron reflectometry

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10.1016/j.physb.2007.02.066

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@article{54740dc19b8441c4bc40e69a0834b06b,

title = "Polarized neutron reflectivity studies on granular Co80Fe20/Al2O3 multilayers",

abstract = "Polarized neutron reflectivity (PNR) studies have been performed on granular multilayers [Co80Fe20(tn)/Al2O3 (3 nm)]m. For a non-percolating superferromagnetic (SFM) sample (tn=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 (tn=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 N{\'e}el and external field interactions apparently give rise to such a modulated magnetization depth profile in these magnetic multilayers.",

keywords = "Dipolar coupling, Magnetic thin films, Magnetization reversal mechanisms, Polarized neutron reflectometry",

author = "S. Bedanta and E. Kentzinger and O. Petracic and W. Kleemann and U. R{\"u}cker and A. Paul and Th Br{\"u}ckel and S. Cardoso and Freitas, {P. P.}",

note = "Funding Information: We thank the DFG (Graduate School GK 277 and KL 306/38-2) for financial support. ",

year = "2007",

month = jul,

day = "15",

doi = "10.1016/j.physb.2007.02.066",

language = "英语",

volume = "397",

pages = "65--67",

journal = "Physica B: Condensed Matter",

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number = "1-2",

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TY - JOUR

T1 - Polarized neutron reflectivity studies on granular Co80Fe20/Al2O3 multilayers

AU - Bedanta, S.

AU - Kentzinger, E.

AU - Petracic, O.

AU - Kleemann, W.

AU - Rücker, U.

AU - Paul, A.

AU - Brückel, Th

AU - Cardoso, S.

AU - Freitas, P. P.

N1 - Funding Information: We thank the DFG (Graduate School GK 277 and KL 306/38-2) for financial support.

PY - 2007/7/15

Y1 - 2007/7/15

N2 - Polarized neutron reflectivity (PNR) studies have been performed on granular multilayers [Co80Fe20(tn)/Al2O3 (3 nm)]m. For a non-percolating superferromagnetic (SFM) sample (tn=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 (tn=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 Néel and external field interactions apparently give rise to such a modulated magnetization depth profile in these magnetic multilayers.

AB - Polarized neutron reflectivity (PNR) studies have been performed on granular multilayers [Co80Fe20(tn)/Al2O3 (3 nm)]m. For a non-percolating superferromagnetic (SFM) sample (tn=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 (tn=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 Néel and external field interactions apparently give rise to such a modulated magnetization depth profile in these magnetic multilayers.

KW - Dipolar coupling

KW - Magnetic thin films

KW - Magnetization reversal mechanisms

KW - Polarized neutron reflectometry

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DO - 10.1016/j.physb.2007.02.066

M3 - 文章

AN - SCOPUS:34250618293

SN - 0921-4526

VL - 397

SP - 65

EP - 67

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-2

ER -

Polarized neutron reflectivity studies on granular Co₈₀Fe₂₀/Al₂O₃ multilayers

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Keywords

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