Self-Diffusion in 57Fe/natFe Multilayers by In Situ Neutron Reflectometry

Sajti Szilárd Sajti; László Bottyán; Jean François Moulin; Amitesh Paul

doi:10.1134/S1027451020070460

Self-Diffusion in ⁵⁷Fe/^natFe Multilayers by In Situ Neutron Reflectometry

Sajti Szilárd Sajti, László Bottyán, Jean François Moulin, Amitesh Paul^*

^*Corresponding author for this work

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

Abstract

Abstract: Time-of-flight in situ neutron reflectometry (i-NR) on Si/[⁵⁷Fe(x nm)/^natFe(x nm)]₄/Pt with x = 4 and 8 nm multilayers during consecutive heat treatments at 423, 448, 473 and 498 K reveal an unexpected rearrangement of free volumes and an interface smoothening in the isotopic Fe multilayer below 473 K, before the regime of regular Bragg intensity decay starts. The bilayer period dependence of the diffusivities at around 500 K, however, does not follow predictions of Harrison’s theory for the C-type regime representing grain boundary diffusion.

Original language	English
Pages (from-to)	S1-S4
Journal	Journal of Surface Investigation
Volume	14
DOIs	https://doi.org/10.1134/S1027451020070460
State	Published - 1 Oct 2020
Externally published	Yes

Keywords

grain boundary diffusion
in situ
iron
neutron reflectometry
self diffusion

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title = "Self-Diffusion in 57Fe/natFe Multilayers by In Situ Neutron Reflectometry",

abstract = "Abstract: Time-of-flight in situ neutron reflectometry (i-NR) on Si/[57Fe(x nm)/natFe(x nm)]4/Pt with x = 4 and 8 nm multilayers during consecutive heat treatments at 423, 448, 473 and 498 K reveal an unexpected rearrangement of free volumes and an interface smoothening in the isotopic Fe multilayer below 473 K, before the regime of regular Bragg intensity decay starts. The bilayer period dependence of the diffusivities at around 500 K, however, does not follow predictions of Harrison{\textquoteright}s theory for the C-type regime representing grain boundary diffusion.",

keywords = "grain boundary diffusion, in situ, iron, neutron reflectometry, self diffusion",

author = "{Szil{\'a}rd Sajti}, Sajti and L{\'a}szl{\'o} Botty{\'a}n and Moulin, {Jean Fran{\c c}ois} and Amitesh Paul",

year = "2020",

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doi = "10.1134/S1027451020070460",

language = "英语",

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TY - JOUR

T1 - Self-Diffusion in 57Fe/natFe Multilayers by In Situ Neutron Reflectometry

AU - Szilárd Sajti, Sajti

AU - Bottyán, László

AU - Moulin, Jean François

AU - Paul, Amitesh

PY - 2020/10/1

Y1 - 2020/10/1

N2 - Abstract: Time-of-flight in situ neutron reflectometry (i-NR) on Si/[57Fe(x nm)/natFe(x nm)]4/Pt with x = 4 and 8 nm multilayers during consecutive heat treatments at 423, 448, 473 and 498 K reveal an unexpected rearrangement of free volumes and an interface smoothening in the isotopic Fe multilayer below 473 K, before the regime of regular Bragg intensity decay starts. The bilayer period dependence of the diffusivities at around 500 K, however, does not follow predictions of Harrison’s theory for the C-type regime representing grain boundary diffusion.

AB - Abstract: Time-of-flight in situ neutron reflectometry (i-NR) on Si/[57Fe(x nm)/natFe(x nm)]4/Pt with x = 4 and 8 nm multilayers during consecutive heat treatments at 423, 448, 473 and 498 K reveal an unexpected rearrangement of free volumes and an interface smoothening in the isotopic Fe multilayer below 473 K, before the regime of regular Bragg intensity decay starts. The bilayer period dependence of the diffusivities at around 500 K, however, does not follow predictions of Harrison’s theory for the C-type regime representing grain boundary diffusion.

KW - grain boundary diffusion

KW - in situ

KW - iron

KW - neutron reflectometry

KW - self diffusion

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DO - 10.1134/S1027451020070460

M3 - 文章

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VL - 14

SP - S1-S4

JO - Journal of Surface Investigation

JF - Journal of Surface Investigation

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