Limitations of the kinematic approximation in neutron reflectivity measurements for the analysis of bilayers

被引:0
|
作者
Droulias, Sotirios A. [1 ]
Palsson, Gunnar K. [1 ]
Hjorvarsson, Bjorgvin [1 ]
Wolff, Max [1 ]
机构
[1] Uppsala Univ, Div Mat Phys, Dept Phys & Astron, Box 516, SE-75121 Uppsala, Sweden
来源
JOURNAL OF APPLIED CRYSTALLOGRAPHY | 2018年 / 51卷
关键词
neutron reflectivity; superlattices; deuterium; volume expansion; Parratt's algorithm; STRAIN;
D O I
10.1107/S1600576718013092
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The limitations of a phenomenological fitting approach compared to simulations of the optical model including reflection and refraction at all interfaces are demonstrated using the example of hydrogen loading in ultra-thin vanadium layers. Fe/V superlattices are loaded with deuterium and the lattice expansion and deuterium concentration are extracted from neutron reflectivity data. A noticeable difference is found between the extraction of concentrations and bilayer thicknesses directly from the superlattice peaks and fits of the density profile using the Parratt formalism. The results underline the importance of carefully considering the limitations of phenomenological approaches, in order to obtain robust results. The limitations of the kinematic approximation for the analysis are discussed in detail.
引用
收藏
页码:1556 / 1563
页数:8
相关论文
共 50 条
  • [31] THICKNESS MEASUREMENTS OF FULLY HYDRATED BILAYERS BY NEUTRON-SCATTERING
    RIVAS, E
    REISSHUSSON, F
    SADLER, DM
    ARCHIVOS DE BIOLOGIA Y MEDICINA EXPERIMENTALES, 1986, 19 (02): : R245 - R245
  • [32] Limitations of the axial recoil approximation in measurements of molecular dissociation
    Wood, RM
    Zheng, Q
    Edwards, AK
    Mangan, MA
    REVIEW OF SCIENTIFIC INSTRUMENTS, 1997, 68 (03): : 1382 - 1386
  • [33] Magnetization processes in exchange-biased MnPd/Fe bilayers studied by polarized neutron reflectivity
    Blomqvist, P.
    Krishnan, Karman M.
    Srinath, S.
    Te Velthuis, S.G.E.
    Journal of Applied Physics, 2004, 96 (11): : 6523 - 6525
  • [34] Magnetization processes in exchange-biased MnPd/Fe bilayers studied by polarized neutron reflectivity
    Blomqvist, P
    Krishnan, KM
    Srinath, S
    te Velthuis, SGE
    JOURNAL OF APPLIED PHYSICS, 2004, 96 (11) : 6523 - 6526
  • [35] Specular Neutron Reflectivity Studies of the Interaction of Cytochrome c with Supported Phosphatidylcholine Bilayers Doped with Phosphotidylserine
    Dabkowska, A. P.
    Fragneto, G.
    Hughes, A. V.
    Quinn, P. J.
    Lawrence, M. J.
    LANGMUIR, 2009, 25 (07) : 4203 - 4210
  • [36] Neutron reflectivity determination of buried electroactive interface structure: PBT/PPy and PBT/PXV bilayers
    Hillman, AR
    Saville, PM
    Glidle, A
    Richardson, RM
    Roser, SJ
    Swann, MJ
    Webster, JRP
    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1998, 120 (49) : 12882 - 12890
  • [37] Neutron Reflectivity Studies of the Interaction of Cubic-Phase Nanoparticles with Phospholipid Bilayers of Different Coverage
    Vandoolaeghe, Pauline
    Rennie, Adrian R.
    Campbell, Richard A.
    Nylander, Tommy
    LANGMUIR, 2009, 25 (07) : 4009 - 4020
  • [39] In-situ hydrogen concentration measurements in multilayers using neutron reflectivity
    Rehm, C
    Klose, F
    Nagengast, D
    Maletta, H
    Weidinger, A
    PHYSICA B, 1997, 234 : 486 - 488
  • [40] Gas-flow humidity control system for neutron reflectivity measurements
    Arima-Osonoi, Hiroshi
    Miyata, Noboru
    Yoshida, Tessei
    Kasai, Satoshi
    Ohuchi, Keiichi
    Zhang, Shuoyuan
    Miyazaki, Tsukasa
    Aoki, Hiroyuki
    REVIEW OF SCIENTIFIC INSTRUMENTS, 2020, 91 (10):