Magnetic Structure and Strain State in Fe/V Superlattices Studied by 57Fe+ Emission and Conversion Electron Mössbauer Spectroscopy

Torben E. Mølholt; Sveinn Ólafsson; Haraldur P. Gunnlaugsson; Bingcui Qi; Karl Johnston; Roberto Mantovan; Hilary Masenda; Krish Bharuth-Ram; Hafliði P. Gíslason; Guido Langouche; Deena Naidoo

doi:10.3390/cryst12070961

Magnetic Structure and Strain State in Fe/V Superlattices Studied by ⁵⁷Fe⁺ Emission and Conversion Electron Mössbauer Spectroscopy

Torben E. Mølholt, Sveinn Ólafsson, Haraldur P. Gunnlaugsson, Bingcui Qi^*, Karl Johnston, Roberto Mantovan, Hilary Masenda, Krish Bharuth-Ram, Hafliði P. Gíslason, Guido Langouche, Deena Naidoo

^*Corresponding author for this work

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

Abstract

The magnetic properties of the Fe/V superlattices were studied by conventional Conversion Electron Mössbauer Spectroscopy (CEMS) and online (Formula presented.) Fe (Formula presented.) emission Mössbauer Spectroscopy (eMS) at room temperature (RT) at ISOLDE/CERN. The unique depth-enhanced sensitivity and ultradiluted regime of the probe atoms adopted in this eMS facility enabled the investigation of the magnetic structures and the strain state in the superlattice layers and at the interfaces. The magnetic spectra of the superlattices were found to depend on both the local lattice environment and the strain state of the Fe-lattices. The magnetic polarisation in the V-layers or at the interfaces was not detected at RT. Spectral broadening was evident in the single line component of the eMS due to Fe ions substituted at V-lattice sites in the V-layers of the superlattice, attributable to the lattice strain in the V-layers. Our study demonstrate that with the online eMS technique the effects of the strain state of the superlattice on the magnetic properties of the Fe-layer in the Fe/V multilayer structures can be detected.

Original language	English
Article number	961
Journal	Crystals
Volume	12
Issue number	7
DOIs	https://doi.org/10.3390/cryst12070961
Publication status	Published - 10 Jul 2022

Bibliographical note

Funding Information:
The European Union Sixth Framework through RII3-EURONS; South African National Research Foundation; German BMBF (contract no. 05KK4TS1/9);Icelandic Research Fund.

Publisher Copyright:
© 2022 by the authors.

Other keywords

Fe/V superlattices
hyperfine parameters
magnetic properties
Mössbauer Spectroscopy
strain

Access to Document

10.3390/cryst12070961

Cite this

Mølholt, T. E., Ólafsson, S., Gunnlaugsson, H. P., Qi, B., Johnston, K., Mantovan, R., Masenda, H., Bharuth-Ram, K., Gíslason, H. P., Langouche, G., & Naidoo, D. (2022). Magnetic Structure and Strain State in Fe/V Superlattices Studied by ⁵⁷Fe⁺ Emission and Conversion Electron Mössbauer Spectroscopy. Crystals, 12(7), Article 961. https://doi.org/10.3390/cryst12070961

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title = "Magnetic Structure and Strain State in Fe/V Superlattices Studied by 57Fe+ Emission and Conversion Electron M{\"o}ssbauer Spectroscopy",

abstract = "The magnetic properties of the Fe/V superlattices were studied by conventional Conversion Electron M{\"o}ssbauer Spectroscopy (CEMS) and online (Formula presented.) Fe (Formula presented.) emission M{\"o}ssbauer Spectroscopy (eMS) at room temperature (RT) at ISOLDE/CERN. The unique depth-enhanced sensitivity and ultradiluted regime of the probe atoms adopted in this eMS facility enabled the investigation of the magnetic structures and the strain state in the superlattice layers and at the interfaces. The magnetic spectra of the superlattices were found to depend on both the local lattice environment and the strain state of the Fe-lattices. The magnetic polarisation in the V-layers or at the interfaces was not detected at RT. Spectral broadening was evident in the single line component of the eMS due to Fe ions substituted at V-lattice sites in the V-layers of the superlattice, attributable to the lattice strain in the V-layers. Our study demonstrate that with the online eMS technique the effects of the strain state of the superlattice on the magnetic properties of the Fe-layer in the Fe/V multilayer structures can be detected.",

keywords = "Fe/V superlattices, hyperfine parameters, magnetic properties, M{\"o}ssbauer Spectroscopy, strain",

author = "M{\o}lholt, {Torben E.} and Sveinn {\'O}lafsson and Gunnlaugsson, {Haraldur P.} and Bingcui Qi and Karl Johnston and Roberto Mantovan and Hilary Masenda and Krish Bharuth-Ram and G{\'i}slason, {Hafli{\dh}i P.} and Guido Langouche and Deena Naidoo",

note = "Funding Information: The European Union Sixth Framework through RII3-EURONS; South African National Research Foundation; German BMBF (contract no. 05KK4TS1/9);Icelandic Research Fund. Publisher Copyright: {\textcopyright} 2022 by the authors.",

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AU - Mølholt, Torben E.

AU - Ólafsson, Sveinn

AU - Gunnlaugsson, Haraldur P.

AU - Qi, Bingcui

AU - Johnston, Karl

AU - Mantovan, Roberto

AU - Masenda, Hilary

AU - Bharuth-Ram, Krish

AU - Gíslason, Hafliði P.

AU - Langouche, Guido

AU - Naidoo, Deena

N1 - Funding Information: The European Union Sixth Framework through RII3-EURONS; South African National Research Foundation; German BMBF (contract no. 05KK4TS1/9);Icelandic Research Fund. Publisher Copyright: © 2022 by the authors.

PY - 2022/7/10

Y1 - 2022/7/10

N2 - The magnetic properties of the Fe/V superlattices were studied by conventional Conversion Electron Mössbauer Spectroscopy (CEMS) and online (Formula presented.) Fe (Formula presented.) emission Mössbauer Spectroscopy (eMS) at room temperature (RT) at ISOLDE/CERN. The unique depth-enhanced sensitivity and ultradiluted regime of the probe atoms adopted in this eMS facility enabled the investigation of the magnetic structures and the strain state in the superlattice layers and at the interfaces. The magnetic spectra of the superlattices were found to depend on both the local lattice environment and the strain state of the Fe-lattices. The magnetic polarisation in the V-layers or at the interfaces was not detected at RT. Spectral broadening was evident in the single line component of the eMS due to Fe ions substituted at V-lattice sites in the V-layers of the superlattice, attributable to the lattice strain in the V-layers. Our study demonstrate that with the online eMS technique the effects of the strain state of the superlattice on the magnetic properties of the Fe-layer in the Fe/V multilayer structures can be detected.

AB - The magnetic properties of the Fe/V superlattices were studied by conventional Conversion Electron Mössbauer Spectroscopy (CEMS) and online (Formula presented.) Fe (Formula presented.) emission Mössbauer Spectroscopy (eMS) at room temperature (RT) at ISOLDE/CERN. The unique depth-enhanced sensitivity and ultradiluted regime of the probe atoms adopted in this eMS facility enabled the investigation of the magnetic structures and the strain state in the superlattice layers and at the interfaces. The magnetic spectra of the superlattices were found to depend on both the local lattice environment and the strain state of the Fe-lattices. The magnetic polarisation in the V-layers or at the interfaces was not detected at RT. Spectral broadening was evident in the single line component of the eMS due to Fe ions substituted at V-lattice sites in the V-layers of the superlattice, attributable to the lattice strain in the V-layers. Our study demonstrate that with the online eMS technique the effects of the strain state of the superlattice on the magnetic properties of the Fe-layer in the Fe/V multilayer structures can be detected.

KW - Fe/V superlattices

KW - hyperfine parameters

KW - magnetic properties

KW - Mössbauer Spectroscopy

KW - strain

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