Femtosecond Laser Ablation-Induced Magnetic Phase Transformations in FeRh Thin Films
In this study, we present a novel investigation into the magnetic and morphological properties of equiatomic B2-ordered FeRh thin films irradiated with single high-intensity ultrashort laser pulses. The goal is to elucidate the effect of femtosecond laser ablation on the magnetic properties of FeRh....
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Magnetochemistry |
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| Online Access: | https://www.mdpi.com/2312-7481/9/7/186 |
| _version_ | 1827732529087512576 |
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| author | Pavel Varlamov Anna Semisalova Anh Dung Nguyen Michael Farle Yannis Laplace Michele Raynaud Olivier Noel Paolo Vavassori Vasily Temnov |
| author_facet | Pavel Varlamov Anna Semisalova Anh Dung Nguyen Michael Farle Yannis Laplace Michele Raynaud Olivier Noel Paolo Vavassori Vasily Temnov |
| author_sort | Pavel Varlamov |
| collection | DOAJ |
| description | In this study, we present a novel investigation into the magnetic and morphological properties of equiatomic B2-ordered FeRh thin films irradiated with single high-intensity ultrashort laser pulses. The goal is to elucidate the effect of femtosecond laser ablation on the magnetic properties of FeRh. We employed Scanning Magneto-Optical Kerr Effect (S-MOKE) microscopy to examine the magnetic phase after laser processing, providing high spatial resolution and sensitivity. Our results for the first time demonstrated the appearance of a magneto-optical signal from the bottom of ablation craters, suggesting a transition from antiferromagnetic to ferromagnetic behavior. Fluence-resolved measurements clearly demonstrate that the ablation threshold coincides with the threshold of the antiferromagnet-to-ferromagnet phase transition. The existence of such a magnetic phase transition was independently confirmed by temperature-dependent S-MOKE measurements using a CW laser as a localized heat source. Whereas the initial FeRh film displayed a reversible antiferromagnet-ferromagnet phase transition, the laser-ablated structures exhibited irreversible changes in their magnetic properties. This comprehensive analysis revealed the strong correlation between the femtosecond laser ablation process and the magnetic phase transformation in FeRh thin films. |
| first_indexed | 2024-03-11T00:53:29Z |
| format | Article |
| id | doaj.art-11eb0a09e4a54455a41e1a9d34a5fee8 |
| institution | Directory Open Access Journal |
| issn | 2312-7481 |
| language | English |
| last_indexed | 2024-03-11T00:53:29Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Magnetochemistry |
| spelling | doaj.art-11eb0a09e4a54455a41e1a9d34a5fee82023-11-18T20:13:44ZengMDPI AGMagnetochemistry2312-74812023-07-019718610.3390/magnetochemistry9070186Femtosecond Laser Ablation-Induced Magnetic Phase Transformations in FeRh Thin FilmsPavel Varlamov0Anna Semisalova1Anh Dung Nguyen2Michael Farle3Yannis Laplace4Michele Raynaud5Olivier Noel6Paolo Vavassori7Vasily Temnov8LSI, Ecole Polytechnique, CEA/DRF/IRAMIS, CNRS, Institut Polytechnique de Paris, 91128 Palaiseau, FranceFaculty of Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, GermanyInstitut des Molécules et Matériaux du Mans—UMR 6283 CNRS, Le Mans Université, 72085 Le Mans, FranceFaculty of Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, GermanyLSI, Ecole Polytechnique, CEA/DRF/IRAMIS, CNRS, Institut Polytechnique de Paris, 91128 Palaiseau, FranceLSI, Ecole Polytechnique, CEA/DRF/IRAMIS, CNRS, Institut Polytechnique de Paris, 91128 Palaiseau, FranceInstitut des Molécules et Matériaux du Mans—UMR 6283 CNRS, Le Mans Université, 72085 Le Mans, FranceCIC nanoGUNE—BRTA, Donostia—San Sebastian, 20018 Donostia, SpainLSI, Ecole Polytechnique, CEA/DRF/IRAMIS, CNRS, Institut Polytechnique de Paris, 91128 Palaiseau, FranceIn this study, we present a novel investigation into the magnetic and morphological properties of equiatomic B2-ordered FeRh thin films irradiated with single high-intensity ultrashort laser pulses. The goal is to elucidate the effect of femtosecond laser ablation on the magnetic properties of FeRh. We employed Scanning Magneto-Optical Kerr Effect (S-MOKE) microscopy to examine the magnetic phase after laser processing, providing high spatial resolution and sensitivity. Our results for the first time demonstrated the appearance of a magneto-optical signal from the bottom of ablation craters, suggesting a transition from antiferromagnetic to ferromagnetic behavior. Fluence-resolved measurements clearly demonstrate that the ablation threshold coincides with the threshold of the antiferromagnet-to-ferromagnet phase transition. The existence of such a magnetic phase transition was independently confirmed by temperature-dependent S-MOKE measurements using a CW laser as a localized heat source. Whereas the initial FeRh film displayed a reversible antiferromagnet-ferromagnet phase transition, the laser-ablated structures exhibited irreversible changes in their magnetic properties. This comprehensive analysis revealed the strong correlation between the femtosecond laser ablation process and the magnetic phase transformation in FeRh thin films.https://www.mdpi.com/2312-7481/9/7/186FeRh filmsfemtosecond laser pulselaser ablationS-MOKE microscopyantiferromagnetismferromagnetism |
| spellingShingle | Pavel Varlamov Anna Semisalova Anh Dung Nguyen Michael Farle Yannis Laplace Michele Raynaud Olivier Noel Paolo Vavassori Vasily Temnov Femtosecond Laser Ablation-Induced Magnetic Phase Transformations in FeRh Thin Films Magnetochemistry FeRh films femtosecond laser pulse laser ablation S-MOKE microscopy antiferromagnetism ferromagnetism |
| title | Femtosecond Laser Ablation-Induced Magnetic Phase Transformations in FeRh Thin Films |
| title_full | Femtosecond Laser Ablation-Induced Magnetic Phase Transformations in FeRh Thin Films |
| title_fullStr | Femtosecond Laser Ablation-Induced Magnetic Phase Transformations in FeRh Thin Films |
| title_full_unstemmed | Femtosecond Laser Ablation-Induced Magnetic Phase Transformations in FeRh Thin Films |
| title_short | Femtosecond Laser Ablation-Induced Magnetic Phase Transformations in FeRh Thin Films |
| title_sort | femtosecond laser ablation induced magnetic phase transformations in ferh thin films |
| topic | FeRh films femtosecond laser pulse laser ablation S-MOKE microscopy antiferromagnetism ferromagnetism |
| url | https://www.mdpi.com/2312-7481/9/7/186 |
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