Time-Resolved XUV Absorption Spectroscopy and Magnetic Circular Dichroism at the Ni <i>M</i><sub>2,3</sub>-Edges
Ultrashort optical pulses can trigger a variety of non-equilibrium processes in magnetic thin films affecting electrons and spins on femtosecond timescales. In order to probe the charge and magnetic degrees of freedom simultaneously, we developed an X-ray streaking technique that has the advantage o...
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2020-12-01
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| author | Marcel Hennes Benedikt Rösner Valentin Chardonnet Gheorghe S. Chiuzbaian Renaud Delaunay Florian Döring Vitaliy A. Guzenko Michel Hehn Romain Jarrier Armin Kleibert Maxime Lebugle Jan Lüning Gregory Malinowski Aladine Merhe Denys Naumenko Ivaylo P. Nikolov Ignacio Lopez-Quintas Emanuele Pedersoli Tatiana Savchenko Benjamin Watts Marco Zangrando Christian David Flavio Capotondi Boris Vodungbo Emmanuelle Jal |
| author_facet | Marcel Hennes Benedikt Rösner Valentin Chardonnet Gheorghe S. Chiuzbaian Renaud Delaunay Florian Döring Vitaliy A. Guzenko Michel Hehn Romain Jarrier Armin Kleibert Maxime Lebugle Jan Lüning Gregory Malinowski Aladine Merhe Denys Naumenko Ivaylo P. Nikolov Ignacio Lopez-Quintas Emanuele Pedersoli Tatiana Savchenko Benjamin Watts Marco Zangrando Christian David Flavio Capotondi Boris Vodungbo Emmanuelle Jal |
| author_sort | Marcel Hennes |
| collection | DOAJ |
| description | Ultrashort optical pulses can trigger a variety of non-equilibrium processes in magnetic thin films affecting electrons and spins on femtosecond timescales. In order to probe the charge and magnetic degrees of freedom simultaneously, we developed an X-ray streaking technique that has the advantage of providing a jitter-free picture of absorption cross-section changes. In this paper, we present an experiment based on this approach, which we performed using five photon probing energies at the Ni <inline-formula><math display="inline"><semantics><msub><mi>M</mi><mrow><mn>2</mn><mo>,</mo><mn>3</mn></mrow></msub></semantics></math></inline-formula>-edges. This allowed us to retrieve the absorption and magnetic circular dichroism time traces, yielding detailed information on transient modifications of electron and spin populations close to the Fermi level. Our findings suggest that the observed absorption and magnetic circular dichroism dynamics both depend on the extreme ultraviolet (XUV) probing wavelength, and can be described, at least qualitatively, by assuming ultrafast energy shifts of the electronic and magnetic elemental absorption resonances, as reported in recent work. However, our analysis also hints at more complex changes, highlighting the need for further experimental and theoretical studies in order to gain a thorough understanding of the interplay of electronic and spin degrees of freedom in optically excited magnetic thin films. |
| first_indexed | 2024-03-10T13:36:55Z |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T13:36:55Z |
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| spelling | doaj.art-900350a1dc424752a280c68bc0c0151c2023-11-21T07:26:56ZengMDPI AGApplied Sciences2076-34172020-12-0111132510.3390/app11010325Time-Resolved XUV Absorption Spectroscopy and Magnetic Circular Dichroism at the Ni <i>M</i><sub>2,3</sub>-EdgesMarcel Hennes0Benedikt Rösner1Valentin Chardonnet2Gheorghe S. Chiuzbaian3Renaud Delaunay4Florian Döring5Vitaliy A. Guzenko6Michel Hehn7Romain Jarrier8Armin Kleibert9Maxime Lebugle10Jan Lüning11Gregory Malinowski12Aladine Merhe13Denys Naumenko14Ivaylo P. Nikolov15Ignacio Lopez-Quintas16Emanuele Pedersoli17Tatiana Savchenko18Benjamin Watts19Marco Zangrando20Christian David21Flavio Capotondi22Boris Vodungbo23Emmanuelle Jal24Sorbonne Université, CNRS, Laboratoire de Chimie Physique—Matière et Rayonnement, LCPMR, 75005 Paris, FrancePaul Scherrer Institut, PSI 5232 Villigen, SwitzerlandSorbonne Université, CNRS, Laboratoire de Chimie Physique—Matière et Rayonnement, LCPMR, 75005 Paris, FranceSorbonne Université, CNRS, Laboratoire de Chimie Physique—Matière et Rayonnement, LCPMR, 75005 Paris, FranceSorbonne Université, CNRS, Laboratoire de Chimie Physique—Matière et Rayonnement, LCPMR, 75005 Paris, FrancePaul Scherrer Institut, PSI 5232 Villigen, SwitzerlandPaul Scherrer Institut, PSI 5232 Villigen, SwitzerlandInstitut Jean Lamour, Université de Lorraine, 54011 Nancy, FranceSorbonne Université, CNRS, Laboratoire de Chimie Physique—Matière et Rayonnement, LCPMR, 75005 Paris, FrancePaul Scherrer Institut, PSI 5232 Villigen, SwitzerlandPaul Scherrer Institut, PSI 5232 Villigen, SwitzerlandSorbonne Université, CNRS, Laboratoire de Chimie Physique—Matière et Rayonnement, LCPMR, 75005 Paris, FranceInstitut Jean Lamour, Université de Lorraine, 54011 Nancy, FranceSorbonne Université, CNRS, Laboratoire de Chimie Physique—Matière et Rayonnement, LCPMR, 75005 Paris, FranceElettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalyPaul Scherrer Institut, PSI 5232 Villigen, SwitzerlandPaul Scherrer Institut, PSI 5232 Villigen, SwitzerlandElettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalyPaul Scherrer Institut, PSI 5232 Villigen, SwitzerlandElettra-Sincrotrone Trieste SCpA, 34149 Basovizza, Trieste, ItalySorbonne Université, CNRS, Laboratoire de Chimie Physique—Matière et Rayonnement, LCPMR, 75005 Paris, FranceSorbonne Université, CNRS, Laboratoire de Chimie Physique—Matière et Rayonnement, LCPMR, 75005 Paris, FranceUltrashort optical pulses can trigger a variety of non-equilibrium processes in magnetic thin films affecting electrons and spins on femtosecond timescales. In order to probe the charge and magnetic degrees of freedom simultaneously, we developed an X-ray streaking technique that has the advantage of providing a jitter-free picture of absorption cross-section changes. In this paper, we present an experiment based on this approach, which we performed using five photon probing energies at the Ni <inline-formula><math display="inline"><semantics><msub><mi>M</mi><mrow><mn>2</mn><mo>,</mo><mn>3</mn></mrow></msub></semantics></math></inline-formula>-edges. This allowed us to retrieve the absorption and magnetic circular dichroism time traces, yielding detailed information on transient modifications of electron and spin populations close to the Fermi level. Our findings suggest that the observed absorption and magnetic circular dichroism dynamics both depend on the extreme ultraviolet (XUV) probing wavelength, and can be described, at least qualitatively, by assuming ultrafast energy shifts of the electronic and magnetic elemental absorption resonances, as reported in recent work. However, our analysis also hints at more complex changes, highlighting the need for further experimental and theoretical studies in order to gain a thorough understanding of the interplay of electronic and spin degrees of freedom in optically excited magnetic thin films.https://www.mdpi.com/2076-3417/11/1/325ultrafast spectroscopyfemtomagnetismXUV-FELmagnetic circular dichroism |
| spellingShingle | Marcel Hennes Benedikt Rösner Valentin Chardonnet Gheorghe S. Chiuzbaian Renaud Delaunay Florian Döring Vitaliy A. Guzenko Michel Hehn Romain Jarrier Armin Kleibert Maxime Lebugle Jan Lüning Gregory Malinowski Aladine Merhe Denys Naumenko Ivaylo P. Nikolov Ignacio Lopez-Quintas Emanuele Pedersoli Tatiana Savchenko Benjamin Watts Marco Zangrando Christian David Flavio Capotondi Boris Vodungbo Emmanuelle Jal Time-Resolved XUV Absorption Spectroscopy and Magnetic Circular Dichroism at the Ni <i>M</i><sub>2,3</sub>-Edges Applied Sciences ultrafast spectroscopy femtomagnetism XUV-FEL magnetic circular dichroism |
| title | Time-Resolved XUV Absorption Spectroscopy and Magnetic Circular Dichroism at the Ni <i>M</i><sub>2,3</sub>-Edges |
| title_full | Time-Resolved XUV Absorption Spectroscopy and Magnetic Circular Dichroism at the Ni <i>M</i><sub>2,3</sub>-Edges |
| title_fullStr | Time-Resolved XUV Absorption Spectroscopy and Magnetic Circular Dichroism at the Ni <i>M</i><sub>2,3</sub>-Edges |
| title_full_unstemmed | Time-Resolved XUV Absorption Spectroscopy and Magnetic Circular Dichroism at the Ni <i>M</i><sub>2,3</sub>-Edges |
| title_short | Time-Resolved XUV Absorption Spectroscopy and Magnetic Circular Dichroism at the Ni <i>M</i><sub>2,3</sub>-Edges |
| title_sort | time resolved xuv absorption spectroscopy and magnetic circular dichroism at the ni i m i sub 2 3 sub edges |
| topic | ultrafast spectroscopy femtomagnetism XUV-FEL magnetic circular dichroism |
| url | https://www.mdpi.com/2076-3417/11/1/325 |
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