Controlling All‐Optical Helicity‐Dependent Switching in Engineered Rare‐Earth Free Synthetic Ferrimagnets
Abstract All‐optical helicity‐dependent switching in ferromagnetic layers has revealed an unprecedented route to manipulate magnetic configurations by circularly polarized femtosecond laser pulses. In this work, rare‐earth free synthetic ferrimagnetic heterostructures made from two antiferromagnetic...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-12-01
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| Series: | Advanced Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/advs.201901876 |
| _version_ | 1818251972027875328 |
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| author | Jung‐Wei Liao Pierre Vallobra Liam O'Brien Unai Atxitia Victor Raposo Dorothée Petit Tarun Vemulkar Gregory Malinowski Michel Hehn Eduardo Martínez Stéphane Mangin Russell P. Cowburn |
| author_facet | Jung‐Wei Liao Pierre Vallobra Liam O'Brien Unai Atxitia Victor Raposo Dorothée Petit Tarun Vemulkar Gregory Malinowski Michel Hehn Eduardo Martínez Stéphane Mangin Russell P. Cowburn |
| author_sort | Jung‐Wei Liao |
| collection | DOAJ |
| description | Abstract All‐optical helicity‐dependent switching in ferromagnetic layers has revealed an unprecedented route to manipulate magnetic configurations by circularly polarized femtosecond laser pulses. In this work, rare‐earth free synthetic ferrimagnetic heterostructures made from two antiferromagnetically exchange coupled ferromagnetic layers are studied. Experimental results, supported by numerical simulations, show that the designed structures enable all‐optical switching which is controlled, not only by light helicity, but also by the relative Curie temperature of each ferromagnetic layer. Indeed, through the antiferromagnetic exchange coupling, the layer with the larger Curie temperature determines the final orientation of the other layer and so the synthetic ferrimagnet. For similar Curie temperatures, helicity‐independent back switching is observed and the final magnetic configuration is solely determined by the initial magnetic state. This demonstration of electrically‐detected, optical control of engineered rare‐earth free heterostructures opens a novel route toward practical opto‐spintronics. |
| first_indexed | 2024-12-12T16:16:46Z |
| format | Article |
| id | doaj.art-e2f1e2738f344be9a2048da90505a7a0 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-12-12T16:16:46Z |
| publishDate | 2019-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-e2f1e2738f344be9a2048da90505a7a02022-12-22T00:19:05ZengWileyAdvanced Science2198-38442019-12-01624n/an/a10.1002/advs.201901876Controlling All‐Optical Helicity‐Dependent Switching in Engineered Rare‐Earth Free Synthetic FerrimagnetsJung‐Wei Liao0Pierre Vallobra1Liam O'Brien2Unai Atxitia3Victor Raposo4Dorothée Petit5Tarun Vemulkar6Gregory Malinowski7Michel Hehn8Eduardo Martínez9Stéphane Mangin10Russell P. Cowburn11Cavendish Laboratory University of Cambridge J J Thomson Avenue Cambridge CB3 0HE UKInstitute Jean Lamour UMR CNRS 7198 Universite de Lorraine 2 allée André Guinier‐BP 50840 54011 Nancy FranceDepartment of Physics University of Liverpool Liverpool L69 7ZE UKDepartment of Physics Freie Universität Berlin Arnimalle 14 14195 Berlin GermanyDepartment of Applied Physics of the Faculty of Science University of Salamanca 37008 Salamanca SpainCavendish Laboratory University of Cambridge J J Thomson Avenue Cambridge CB3 0HE UKCavendish Laboratory University of Cambridge J J Thomson Avenue Cambridge CB3 0HE UKInstitute Jean Lamour UMR CNRS 7198 Universite de Lorraine 2 allée André Guinier‐BP 50840 54011 Nancy FranceInstitute Jean Lamour UMR CNRS 7198 Universite de Lorraine 2 allée André Guinier‐BP 50840 54011 Nancy FranceDepartment of Applied Physics of the Faculty of Science University of Salamanca 37008 Salamanca SpainInstitute Jean Lamour UMR CNRS 7198 Universite de Lorraine 2 allée André Guinier‐BP 50840 54011 Nancy FranceCavendish Laboratory University of Cambridge J J Thomson Avenue Cambridge CB3 0HE UKAbstract All‐optical helicity‐dependent switching in ferromagnetic layers has revealed an unprecedented route to manipulate magnetic configurations by circularly polarized femtosecond laser pulses. In this work, rare‐earth free synthetic ferrimagnetic heterostructures made from two antiferromagnetically exchange coupled ferromagnetic layers are studied. Experimental results, supported by numerical simulations, show that the designed structures enable all‐optical switching which is controlled, not only by light helicity, but also by the relative Curie temperature of each ferromagnetic layer. Indeed, through the antiferromagnetic exchange coupling, the layer with the larger Curie temperature determines the final orientation of the other layer and so the synthetic ferrimagnet. For similar Curie temperatures, helicity‐independent back switching is observed and the final magnetic configuration is solely determined by the initial magnetic state. This demonstration of electrically‐detected, optical control of engineered rare‐earth free heterostructures opens a novel route toward practical opto‐spintronics.https://doi.org/10.1002/advs.201901876all‐optical switchingferromagnetssynthetic ferrimagnets |
| spellingShingle | Jung‐Wei Liao Pierre Vallobra Liam O'Brien Unai Atxitia Victor Raposo Dorothée Petit Tarun Vemulkar Gregory Malinowski Michel Hehn Eduardo Martínez Stéphane Mangin Russell P. Cowburn Controlling All‐Optical Helicity‐Dependent Switching in Engineered Rare‐Earth Free Synthetic Ferrimagnets Advanced Science all‐optical switching ferromagnets synthetic ferrimagnets |
| title | Controlling All‐Optical Helicity‐Dependent Switching in Engineered Rare‐Earth Free Synthetic Ferrimagnets |
| title_full | Controlling All‐Optical Helicity‐Dependent Switching in Engineered Rare‐Earth Free Synthetic Ferrimagnets |
| title_fullStr | Controlling All‐Optical Helicity‐Dependent Switching in Engineered Rare‐Earth Free Synthetic Ferrimagnets |
| title_full_unstemmed | Controlling All‐Optical Helicity‐Dependent Switching in Engineered Rare‐Earth Free Synthetic Ferrimagnets |
| title_short | Controlling All‐Optical Helicity‐Dependent Switching in Engineered Rare‐Earth Free Synthetic Ferrimagnets |
| title_sort | controlling all optical helicity dependent switching in engineered rare earth free synthetic ferrimagnets |
| topic | all‐optical switching ferromagnets synthetic ferrimagnets |
| url | https://doi.org/10.1002/advs.201901876 |
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