Ultrafast Optical Control of Magnetic Interactions in Carrier-Density-Controlled Ferromagnetic Semiconductors
Investigation of the interaction of ultrashort laser pulses with magnetically ordered materials has become a fascinating research topic in modern magnetism. Especially, the control of magnetic order by sub-ps laser pulses has become a fundamentally important topic with a high potential for future sp...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-03-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/9/5/948 |
| _version_ | 1818443572270071808 |
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| author | Masakazu Matsubara |
| author_facet | Masakazu Matsubara |
| author_sort | Masakazu Matsubara |
| collection | DOAJ |
| description | Investigation of the interaction of ultrashort laser pulses with magnetically ordered materials has become a fascinating research topic in modern magnetism. Especially, the control of magnetic order by sub-ps laser pulses has become a fundamentally important topic with a high potential for future spintronics applications. This paper will review the recent success in optically controlling the magnetic interactions in carrier-density-controlled ferromagnetic semiconductor EuO doped with Gd ions. When the Gd concentration is low, the magnitude of the magnetic interaction is enhanced by the irradiation of ultrashort laser pulses, whereas it is attenuated when the Gd concentration is high. In ferromagnetic Eu1−xGdxO, we thereby demonstrate the strengthening as well as the weakening of the magnetic interaction by 10% and within 3 ps by optically controlling the magnetic exchange interaction. This principle—ultrafast optical control of magnetic interaction—can be applied to future ultrafast opto-spintronics. |
| first_indexed | 2024-12-14T19:02:10Z |
| format | Article |
| id | doaj.art-e1c6608a201241e883a5cae9a34f2103 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-14T19:02:10Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-e1c6608a201241e883a5cae9a34f21032022-12-21T22:50:56ZengMDPI AGApplied Sciences2076-34172019-03-019594810.3390/app9050948app9050948Ultrafast Optical Control of Magnetic Interactions in Carrier-Density-Controlled Ferromagnetic SemiconductorsMasakazu Matsubara0Department of Physics, Tohoku University, Sendai 980-8578, JapanInvestigation of the interaction of ultrashort laser pulses with magnetically ordered materials has become a fascinating research topic in modern magnetism. Especially, the control of magnetic order by sub-ps laser pulses has become a fundamentally important topic with a high potential for future spintronics applications. This paper will review the recent success in optically controlling the magnetic interactions in carrier-density-controlled ferromagnetic semiconductor EuO doped with Gd ions. When the Gd concentration is low, the magnitude of the magnetic interaction is enhanced by the irradiation of ultrashort laser pulses, whereas it is attenuated when the Gd concentration is high. In ferromagnetic Eu1−xGdxO, we thereby demonstrate the strengthening as well as the weakening of the magnetic interaction by 10% and within 3 ps by optically controlling the magnetic exchange interaction. This principle—ultrafast optical control of magnetic interaction—can be applied to future ultrafast opto-spintronics.http://www.mdpi.com/2076-3417/9/5/948ultrafast spin controlopto-spintronicsexchange interactioneuropium oxideferromagnetic semiconductornonlinear magneto-opticspump-probe spectroscopy |
| spellingShingle | Masakazu Matsubara Ultrafast Optical Control of Magnetic Interactions in Carrier-Density-Controlled Ferromagnetic Semiconductors Applied Sciences ultrafast spin control opto-spintronics exchange interaction europium oxide ferromagnetic semiconductor nonlinear magneto-optics pump-probe spectroscopy |
| title | Ultrafast Optical Control of Magnetic Interactions in Carrier-Density-Controlled Ferromagnetic Semiconductors |
| title_full | Ultrafast Optical Control of Magnetic Interactions in Carrier-Density-Controlled Ferromagnetic Semiconductors |
| title_fullStr | Ultrafast Optical Control of Magnetic Interactions in Carrier-Density-Controlled Ferromagnetic Semiconductors |
| title_full_unstemmed | Ultrafast Optical Control of Magnetic Interactions in Carrier-Density-Controlled Ferromagnetic Semiconductors |
| title_short | Ultrafast Optical Control of Magnetic Interactions in Carrier-Density-Controlled Ferromagnetic Semiconductors |
| title_sort | ultrafast optical control of magnetic interactions in carrier density controlled ferromagnetic semiconductors |
| topic | ultrafast spin control opto-spintronics exchange interaction europium oxide ferromagnetic semiconductor nonlinear magneto-optics pump-probe spectroscopy |
| url | http://www.mdpi.com/2076-3417/9/5/948 |
| work_keys_str_mv | AT masakazumatsubara ultrafastopticalcontrolofmagneticinteractionsincarrierdensitycontrolledferromagneticsemiconductors |