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Effect of interfacial roughness correlation on diffuse scattering intensity in a neutron supermirror
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10.1063/1.3108542
/content/aip/journal/jap/105/8/10.1063/1.3108542
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/8/10.1063/1.3108542

Figures

Image of FIG. 1.
FIG. 1.

Relationship between scattering geometry and momentum transfer of specular and off-specular (diffuse) scans.

Image of FIG. 2.
FIG. 2.

Measured reflectivity profiles of the Ni/Ti (●) and NiC/Ti (○) supermirrors. The reflectivities at the critical angle were 0.82 and 0.90, respectively.

Image of FIG. 3.
FIG. 3.

Measured diffuse intensity profiles of the Ni/Ti (●) and NiC/Ti (○) supermirrors. (a) Rocking scan with . The solid lines indicate the calculated profiles. (b) Offset scan with .

Image of FIG. 4.
FIG. 4.

X-ray diffraction patterns for the Ni and NiC monolayers and the Si substrate used in this study. The base intensities of the Ni and NiC monolayers are shown to be shifted upward by 100 and 50 units, respectively. The inset shows the entire profile of the Ni(111) peak.

Image of FIG. 5.
FIG. 5.

Measured neutron reflectivity profiles of the Ni (●) and NiC (○) monolayers and the Si substrate (◻). The solid and broken lines indicate the calculated reflectivity profiles of the monolayers and the Si substrate, respectively.

Image of FIG. 6.
FIG. 6.

Measured diffuse intensity profiles of the Ni (●) and NiC (○) monolayers. (Rocking scan with .)

Image of FIG. 7.
FIG. 7.

Measured neutron reflectivity profiles of the Ni/Ti (●) and NiC/Ti (○) multilayers consisting of 300 layers with a bilayer thickness of 10 nm. The solid line indicates the calculated reflectivity profile.

Image of FIG. 8.
FIG. 8.

Measured diffuse intensity profiles of the Ni/Ti (●) and NiC/Ti (○) multilayers consisting of 300 layers with a bilayer thickness of 10 nm. (a) Rocking scan with . (b) Rocking scan with . The solid lines indicate the calculated intensity profiles. (c) Offset scan with .

Image of FIG. 9.
FIG. 9.

Neutron reflectivity profiles of the Ni/Ti (●) and NiC/Ti (○) multilayers consisting of 350 layers with a bilayer structure in which thickness is distributed in the range of . The solid line indicates the calculated reflectivity profile. The inset shows the reflectivity profiles at the Bragg peak on an enlarged scale.

Image of FIG. 10.
FIG. 10.

Measured diffuse intensity profiles of the Ni/Ti (●) and NiC/Ti (○) multilayers consisting of 350 layers with a bilayer structure in which thickness is distributed in the range of . (a) Rocking scan with . The solid lines indicate the calculated intensity profiles. (b) Offset scan with .

Image of FIG. 11.
FIG. 11.

Calculated neutron diffuse intensity profiles for offset scan with . The sample was assumed to be a Ni/Ti multilayer consisting of 100 layers with a bilayer thickness of 10 nm. Calculation was performed for vertical correlation lengths of , 50, 100, and 500 nm. The other parameters were fixed at , , and .

Image of FIG. 12.
FIG. 12.

Multilayer interfaces with different vertical correlation lengths, on which neutron waves are scattered. The diffusely scattered neutrons are concentrated on particular values of the momentum transfer corresponding to the Bragg condition for (a), whereas the neutrons are spread over the entire reciprocal plane for (b).

Tables

Generic image for table
Table I.

Crystallite size in the Ni and NiC monolayers as calculated using the Scherrer equation.

Generic image for table
Table II.

Parameters of the interface structure for the Ni/Ti and NiC/Ti multilayers in the diffuse intensity calculation.

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/content/aip/journal/jap/105/8/10.1063/1.3108542
2009-04-22
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of interfacial roughness correlation on diffuse scattering intensity in a neutron supermirror
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/8/10.1063/1.3108542
10.1063/1.3108542
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