Spin waves excited by hard x-ray transient gratings
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arXiv
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2026
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| author | Miedaner, Peter R. Maznev, Alexei A. Biednov, Mykola Deb, Marwan Serrat, Carles Berndt, Nadia Carrara, Pietro Soncini, Cristian Brioschi, Marta Ronchetti, Daniele Benediktovitch, Andrei Fainozzi, Danny Khatu, Nupur Ferrari, Eugenio Vila-Comamala, Joan Zalden, Peter Gawelda, Wojciech Knoll, Martin Frankenberger, Paul Leroy, Ludmila Mamyrbayev, Talgat Smolentsev, Grigory Gerber, Simon Gessini, Alessandro Bencivenga, Filippo Cucini, Riccardo Rossi, Giorgio Mincigrucci, Riccardo Paltanin, Ettore Chergui, Majed Masciovecchio, Claudio Bonetti, Stefano Uemura, Yohei Huang, Xinchao Xu, Han Lima, Frederico Alves Ardana-Lamas, Fernando Madsen, Anders Torre, Renato Bañares, Luis Szlachetko, Jakub Blachucki, Wojciech Bargheer, Matias Feurer, Thomas Engel, Robin Y. Beye, Martin David, Christian Staub, Urs Cannizzo, Andrea Milne, Cristopher Nelson, Keith A. Svetina, Cristian |
| author_facet | Miedaner, Peter R. Maznev, Alexei A. Biednov, Mykola Deb, Marwan Serrat, Carles Berndt, Nadia Carrara, Pietro Soncini, Cristian Brioschi, Marta Ronchetti, Daniele Benediktovitch, Andrei Fainozzi, Danny Khatu, Nupur Ferrari, Eugenio Vila-Comamala, Joan Zalden, Peter Gawelda, Wojciech Knoll, Martin Frankenberger, Paul Leroy, Ludmila Mamyrbayev, Talgat Smolentsev, Grigory Gerber, Simon Gessini, Alessandro Bencivenga, Filippo Cucini, Riccardo Rossi, Giorgio Mincigrucci, Riccardo Paltanin, Ettore Chergui, Majed Masciovecchio, Claudio Bonetti, Stefano Uemura, Yohei Huang, Xinchao Xu, Han Lima, Frederico Alves Ardana-Lamas, Fernando Madsen, Anders Torre, Renato Bañares, Luis Szlachetko, Jakub Blachucki, Wojciech Bargheer, Matias Feurer, Thomas Engel, Robin Y. Beye, Martin David, Christian Staub, Urs Cannizzo, Andrea Milne, Cristopher Nelson, Keith A. Svetina, Cristian |
| contents | Recent progress in ultrafast x-ray sources helped establish x-rays as an important tool for probing lattice and magnetic dynamics initiated by femtosecond optical pulses. Here, we explore the potential of ultrashort hard x-ray pulses for driving magnetic dynamics. We use a transient grating technique in which a spatially periodic x-ray excitation pattern gives rise to material excitations at a well-defined wave vector, whose dynamics are monitored via diffraction of an optical probe pulse. The excitation of a ferrimagnetic gadolinium bismuth iron garnet film placed in an external tilted magnetic field by x-rays at the Gd L3 edge results in both magnetic and non-magnetic transient gratings whose contributions to the diffracted signal are separated by polarization analysis. We observe the magnetization precession at both longitudinal acoustic and spin wave frequencies. An analysis with the Landau-Lifshitz-Gilbert equation indicates that the magnetization precession is driven by strain resulting from thermal expansion induced by absorbed x-rays. The results establish x-ray transient gratings as a tool for driving coherent phonons and magnons, with the potential of accessing wave vectors across the entire Brillouin zone. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_05941 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Spin waves excited by hard x-ray transient gratings Miedaner, Peter R. Maznev, Alexei A. Biednov, Mykola Deb, Marwan Serrat, Carles Berndt, Nadia Carrara, Pietro Soncini, Cristian Brioschi, Marta Ronchetti, Daniele Benediktovitch, Andrei Fainozzi, Danny Khatu, Nupur Ferrari, Eugenio Vila-Comamala, Joan Zalden, Peter Gawelda, Wojciech Knoll, Martin Frankenberger, Paul Leroy, Ludmila Mamyrbayev, Talgat Smolentsev, Grigory Gerber, Simon Gessini, Alessandro Bencivenga, Filippo Cucini, Riccardo Rossi, Giorgio Mincigrucci, Riccardo Paltanin, Ettore Chergui, Majed Masciovecchio, Claudio Bonetti, Stefano Uemura, Yohei Huang, Xinchao Xu, Han Lima, Frederico Alves Ardana-Lamas, Fernando Madsen, Anders Torre, Renato Bañares, Luis Szlachetko, Jakub Blachucki, Wojciech Bargheer, Matias Feurer, Thomas Engel, Robin Y. Beye, Martin David, Christian Staub, Urs Cannizzo, Andrea Milne, Cristopher Nelson, Keith A. Svetina, Cristian Optics Recent progress in ultrafast x-ray sources helped establish x-rays as an important tool for probing lattice and magnetic dynamics initiated by femtosecond optical pulses. Here, we explore the potential of ultrashort hard x-ray pulses for driving magnetic dynamics. We use a transient grating technique in which a spatially periodic x-ray excitation pattern gives rise to material excitations at a well-defined wave vector, whose dynamics are monitored via diffraction of an optical probe pulse. The excitation of a ferrimagnetic gadolinium bismuth iron garnet film placed in an external tilted magnetic field by x-rays at the Gd L3 edge results in both magnetic and non-magnetic transient gratings whose contributions to the diffracted signal are separated by polarization analysis. We observe the magnetization precession at both longitudinal acoustic and spin wave frequencies. An analysis with the Landau-Lifshitz-Gilbert equation indicates that the magnetization precession is driven by strain resulting from thermal expansion induced by absorbed x-rays. The results establish x-ray transient gratings as a tool for driving coherent phonons and magnons, with the potential of accessing wave vectors across the entire Brillouin zone. |
| title | Spin waves excited by hard x-ray transient gratings |
| topic | Optics |
| url | https://arxiv.org/abs/2601.05941 |