Valence-state mixing and reduced magnetic moment in Fe 3 − δ GeTe 2 single crystals with varying Fe content probed by x-ray spectroscopy
We present a spectroscopic study of the magnetic properties of Fe3−δGeTe2 single crystals with varying Fe content, achieved by tuning the stoichiometry of the crystals. We carried out x-ray absorption spectroscopy and analyzed the x-ray circular magnetic dichroism spectra using the sum rules, to det...
| Main Authors: | , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
IOP Publishing
2024
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| _version_ | 1811140081252040704 |
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| author | Backes, D Fujita, R Veiga, LSI Mayoh, DA Wood, GDA Dhesi, SS Balakrishnan, G van der Laan, G Hesjedal, T |
| author_facet | Backes, D Fujita, R Veiga, LSI Mayoh, DA Wood, GDA Dhesi, SS Balakrishnan, G van der Laan, G Hesjedal, T |
| author_sort | Backes, D |
| collection | OXFORD |
| description | We present a spectroscopic study of the magnetic properties of Fe3−δGeTe2 single crystals with varying Fe content, achieved by tuning the stoichiometry of the crystals. We carried out x-ray absorption spectroscopy and analyzed the x-ray circular magnetic dichroism spectra using the sum rules, to determine the orbital and spin magnetic moments of the materials. We find a clear reduction of the spin and orbital magnetic moment with increasing Fe deficiency. Magnetic susceptibility measurements show that the reduction in magnetization is accompanied by a reduced Curie temperature. Multiplet calculations reveal that the Fe2+ state increasingly mixes with a higher valence state when the Fe deficiency is increased. This effect is correlated with the weakening of the magnetic moment. As single crystals are the base material for exfoliation processes, our results are relevant for the assembly of 2D magnetic heterostructures. |
| first_indexed | 2024-09-25T04:16:18Z |
| format | Journal article |
| id | oxford-uuid:f4307ae6-6b4d-43a9-94df-63406f800e4a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:16:18Z |
| publishDate | 2024 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:f4307ae6-6b4d-43a9-94df-63406f800e4a2024-07-15T20:07:42ZValence-state mixing and reduced magnetic moment in Fe 3 − δ GeTe 2 single crystals with varying Fe content probed by x-ray spectroscopyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f4307ae6-6b4d-43a9-94df-63406f800e4aEnglishJisc Publications RouterIOP Publishing2024Backes, DFujita, RVeiga, LSIMayoh, DAWood, GDADhesi, SSBalakrishnan, Gvan der Laan, GHesjedal, TWe present a spectroscopic study of the magnetic properties of Fe3−δGeTe2 single crystals with varying Fe content, achieved by tuning the stoichiometry of the crystals. We carried out x-ray absorption spectroscopy and analyzed the x-ray circular magnetic dichroism spectra using the sum rules, to determine the orbital and spin magnetic moments of the materials. We find a clear reduction of the spin and orbital magnetic moment with increasing Fe deficiency. Magnetic susceptibility measurements show that the reduction in magnetization is accompanied by a reduced Curie temperature. Multiplet calculations reveal that the Fe2+ state increasingly mixes with a higher valence state when the Fe deficiency is increased. This effect is correlated with the weakening of the magnetic moment. As single crystals are the base material for exfoliation processes, our results are relevant for the assembly of 2D magnetic heterostructures. |
| spellingShingle | Backes, D Fujita, R Veiga, LSI Mayoh, DA Wood, GDA Dhesi, SS Balakrishnan, G van der Laan, G Hesjedal, T Valence-state mixing and reduced magnetic moment in Fe 3 − δ GeTe 2 single crystals with varying Fe content probed by x-ray spectroscopy |
| title | Valence-state mixing and reduced magnetic moment in Fe 3 − δ GeTe 2 single crystals with varying Fe content probed by x-ray spectroscopy |
| title_full | Valence-state mixing and reduced magnetic moment in Fe 3 − δ GeTe 2 single crystals with varying Fe content probed by x-ray spectroscopy |
| title_fullStr | Valence-state mixing and reduced magnetic moment in Fe 3 − δ GeTe 2 single crystals with varying Fe content probed by x-ray spectroscopy |
| title_full_unstemmed | Valence-state mixing and reduced magnetic moment in Fe 3 − δ GeTe 2 single crystals with varying Fe content probed by x-ray spectroscopy |
| title_short | Valence-state mixing and reduced magnetic moment in Fe 3 − δ GeTe 2 single crystals with varying Fe content probed by x-ray spectroscopy |
| title_sort | valence state mixing and reduced magnetic moment in fe 3 δ gete 2 single crystals with varying fe content probed by x ray spectroscopy |
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