Abstract
THz magnetization dynamics of antiferromagnetically coupled spins in ferrimagnetic
Tm3Fe5O12 is excited by a picosecond single-cycle pulse of a magnetic field and probed with the help of the magneto-optical Faraday effect. Data analysis combined with numerical modeling shows that the dynamics corresponds to the exchange mode excited by the Zeeman interaction of the THz magnetic field with the spins. We argue that THz-pump–IR-probe experiments on ferrimagnets offer a unique tool for quantitative studies of dynamics and mechanisms to control antiferromagnetically coupled spins.
Tm3Fe5O12 is excited by a picosecond single-cycle pulse of a magnetic field and probed with the help of the magneto-optical Faraday effect. Data analysis combined with numerical modeling shows that the dynamics corresponds to the exchange mode excited by the Zeeman interaction of the THz magnetic field with the spins. We argue that THz-pump–IR-probe experiments on ferrimagnets offer a unique tool for quantitative studies of dynamics and mechanisms to control antiferromagnetically coupled spins.
| Original language | English |
|---|---|
| Article number | 037203 |
| Number of pages | 6 |
| Journal | Physical Review Letters |
| Volume | 127 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 14 Jul 2021 |
| Externally published | Yes |