Room Temperature Strong Orbital Moments in Perpendicularly Magnetized Magnetic Insulator
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866915058939854848 |
|---|---|
| author | Omar, Ganesh Ji Gargiani, Pierluigi Valvidares, Manuel Lim, Zhi Shiuh Prakash, Saurav Suraj, T. S. Ghosh, Abhijit Ter Lim, Sze Lourembam, James Ariando, Ariando |
| author_facet | Omar, Ganesh Ji Gargiani, Pierluigi Valvidares, Manuel Lim, Zhi Shiuh Prakash, Saurav Suraj, T. S. Ghosh, Abhijit Ter Lim, Sze Lourembam, James Ariando, Ariando |
| contents | The balance between the orbital and spin magnetic moments in a magnetic system is the heart of many intriguing phenomena. Here, we show experimental evidence of a large orbital moment, which competes with its spin counterpart in a ferrimagnetic insulator thulium iron garnet, Tm3Fe5O12. Leveraging element-specific X-ray magnetic circular dichroism (XMCD), we establish that the dominant contribution to the orbital moment originates from 4f orbitals of Tm. Besides the large Tm orbital moment, intriguingly, our results also reveal a smaller but evident non-zero XMCD signal in the O K edge, suggesting additional spin-orbit coupling and exchange interactions with the nearest neighbour Fe atoms. The unquenched orbital moment is primarily responsible for a significant reduction in g-factor, typically 2 in transition metals, as determined independently using ferromagnetic resonance spectroscopy. Our findings reveal a non-linear reduction in the g-factor from 1.7 at 300 K to 1.56 at 200 K in Tm3Fe5O12 thin films. These results provide critical insights into the role of the f orbitals in long-range magnetic order and stimulate further exploration in orbitronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_08448 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Room Temperature Strong Orbital Moments in Perpendicularly Magnetized Magnetic Insulator Omar, Ganesh Ji Gargiani, Pierluigi Valvidares, Manuel Lim, Zhi Shiuh Prakash, Saurav Suraj, T. S. Ghosh, Abhijit Ter Lim, Sze Lourembam, James Ariando, Ariando Materials Science Strongly Correlated Electrons Applied Physics The balance between the orbital and spin magnetic moments in a magnetic system is the heart of many intriguing phenomena. Here, we show experimental evidence of a large orbital moment, which competes with its spin counterpart in a ferrimagnetic insulator thulium iron garnet, Tm3Fe5O12. Leveraging element-specific X-ray magnetic circular dichroism (XMCD), we establish that the dominant contribution to the orbital moment originates from 4f orbitals of Tm. Besides the large Tm orbital moment, intriguingly, our results also reveal a smaller but evident non-zero XMCD signal in the O K edge, suggesting additional spin-orbit coupling and exchange interactions with the nearest neighbour Fe atoms. The unquenched orbital moment is primarily responsible for a significant reduction in g-factor, typically 2 in transition metals, as determined independently using ferromagnetic resonance spectroscopy. Our findings reveal a non-linear reduction in the g-factor from 1.7 at 300 K to 1.56 at 200 K in Tm3Fe5O12 thin films. These results provide critical insights into the role of the f orbitals in long-range magnetic order and stimulate further exploration in orbitronics. |
| title | Room Temperature Strong Orbital Moments in Perpendicularly Magnetized Magnetic Insulator |
| topic | Materials Science Strongly Correlated Electrons Applied Physics |
| url | https://arxiv.org/abs/2412.08448 |