Ferromagnetic Resonance Studies in Magnetic Nanosystems
Ferromagnetic resonance is a powerful method for the study of all classes of magnetic materials. The experimental technique has been used for many decades and is based on the excitation of a magnetic spin system via a microwave (or rf) field. While earlier methods were based on the use of a microwav...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Magnetochemistry |
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| Online Access: | https://www.mdpi.com/2312-7481/7/9/126 |
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| author | David S. Schmool Daniel Markó Ko-Wei Lin Aurelio Hierro-Rodríguez Carlos Quirós Javier Díaz Luis Manuel Álvarez-Prado Jong-Ching Wu |
| author_facet | David S. Schmool Daniel Markó Ko-Wei Lin Aurelio Hierro-Rodríguez Carlos Quirós Javier Díaz Luis Manuel Álvarez-Prado Jong-Ching Wu |
| author_sort | David S. Schmool |
| collection | DOAJ |
| description | Ferromagnetic resonance is a powerful method for the study of all classes of magnetic materials. The experimental technique has been used for many decades and is based on the excitation of a magnetic spin system via a microwave (or rf) field. While earlier methods were based on the use of a microwave spectrometer, more recent developments have seen the widespread use of the vector network analyzer (VNA), which provides a more versatile measurement system at almost comparable sensitivity. While the former is based on a fixed frequency of excitation, the VNA enables frequency-dependent measurements, allowing more in-depth analysis. We have applied this technique to the study of nanostructured thin films or nanodots and coupled magnetic layer systems comprised of exchange-coupled ferromagnetic layers with in-plane and perpendicular magnetic anisotropies. In the first system, we have investigated the magnetization dynamics in Co/Ag bilayers and nanodots. In the second system, we have studied Permalloy (Ni<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>80</mn></msub></semantics></math></inline-formula>Fe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>20</mn></msub></semantics></math></inline-formula>, hereafter Py) thin films coupled via an intervening Al layer of varying thickness to a NdCo film which has perpendicular magnetic anisotropy. |
| first_indexed | 2024-03-10T07:30:20Z |
| format | Article |
| id | doaj.art-cc7683fdd90b4fb5ac8b725b743bcf1c |
| institution | Directory Open Access Journal |
| issn | 2312-7481 |
| language | English |
| last_indexed | 2024-03-10T07:30:20Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Magnetochemistry |
| spelling | doaj.art-cc7683fdd90b4fb5ac8b725b743bcf1c2023-11-22T13:58:04ZengMDPI AGMagnetochemistry2312-74812021-09-017912610.3390/magnetochemistry7090126Ferromagnetic Resonance Studies in Magnetic NanosystemsDavid S. Schmool0Daniel Markó1Ko-Wei Lin2Aurelio Hierro-Rodríguez3Carlos Quirós4Javier Díaz5Luis Manuel Álvarez-Prado6Jong-Ching Wu7GEMaC, CNRS, UVSQ, Université Paris-Saclay, 78035 Versailles, FranceGEMaC, CNRS, UVSQ, Université Paris-Saclay, 78035 Versailles, FranceDepartment of Materials Science and Engineering, National Chung Hsing University, Taichung 402, TaiwanDepartamento de Física, Facultad de Ciencias, Universidad de Oviedo, 33007 Oviedo, SpainDepartamento de Física, Facultad de Ciencias, Universidad de Oviedo, 33007 Oviedo, SpainDepartamento de Física, Facultad de Ciencias, Universidad de Oviedo, 33007 Oviedo, SpainDepartamento de Física, Facultad de Ciencias, Universidad de Oviedo, 33007 Oviedo, SpainDepartment of Physics, National Changhua University of Education, Changhua 500, TaiwanFerromagnetic resonance is a powerful method for the study of all classes of magnetic materials. The experimental technique has been used for many decades and is based on the excitation of a magnetic spin system via a microwave (or rf) field. While earlier methods were based on the use of a microwave spectrometer, more recent developments have seen the widespread use of the vector network analyzer (VNA), which provides a more versatile measurement system at almost comparable sensitivity. While the former is based on a fixed frequency of excitation, the VNA enables frequency-dependent measurements, allowing more in-depth analysis. We have applied this technique to the study of nanostructured thin films or nanodots and coupled magnetic layer systems comprised of exchange-coupled ferromagnetic layers with in-plane and perpendicular magnetic anisotropies. In the first system, we have investigated the magnetization dynamics in Co/Ag bilayers and nanodots. In the second system, we have studied Permalloy (Ni<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>80</mn></msub></semantics></math></inline-formula>Fe<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>20</mn></msub></semantics></math></inline-formula>, hereafter Py) thin films coupled via an intervening Al layer of varying thickness to a NdCo film which has perpendicular magnetic anisotropy.https://www.mdpi.com/2312-7481/7/9/126ferromagnetic resonancemagnetization dynamicsmagnetic nanodotscoupled magnetic thin filmsperpendicular magnetic anisotropy |
| spellingShingle | David S. Schmool Daniel Markó Ko-Wei Lin Aurelio Hierro-Rodríguez Carlos Quirós Javier Díaz Luis Manuel Álvarez-Prado Jong-Ching Wu Ferromagnetic Resonance Studies in Magnetic Nanosystems Magnetochemistry ferromagnetic resonance magnetization dynamics magnetic nanodots coupled magnetic thin films perpendicular magnetic anisotropy |
| title | Ferromagnetic Resonance Studies in Magnetic Nanosystems |
| title_full | Ferromagnetic Resonance Studies in Magnetic Nanosystems |
| title_fullStr | Ferromagnetic Resonance Studies in Magnetic Nanosystems |
| title_full_unstemmed | Ferromagnetic Resonance Studies in Magnetic Nanosystems |
| title_short | Ferromagnetic Resonance Studies in Magnetic Nanosystems |
| title_sort | ferromagnetic resonance studies in magnetic nanosystems |
| topic | ferromagnetic resonance magnetization dynamics magnetic nanodots coupled magnetic thin films perpendicular magnetic anisotropy |
| url | https://www.mdpi.com/2312-7481/7/9/126 |
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