From the 1 of 8 linked papers with an AI index.
8 papers
The interplay of crystal-field transitions and exchange spin dynamics in a ferrimagnet
Arpita Dutta, Pratyay Mukherjee, Ritwik Mondal +1
The paper uses temperature‑dependent THz time‑domain spectroscopy to reveal hybridization between Yb crystal‑field excitations and Yb‑Fe exchange spin modes in a rare‑earth garnet,…
Relativistic theory for coupled orbital and spin angular momentum dynamics in magnetic systems
Subhadip Santra, Ritwik Mondal, Marco Berritta +1
We develop a complete relativistic theory to describe the dynamics of electronic angular momentum including both spin (S) and orbital (L) contributions in magnetic systems. We star…
Unquenched orbital angular momentum as the origin of spin inertia
Tarek Moussa, Darpa Narayan Basu, Ritwik Mondal +1
The recent proposal and observation of spin inertia, and the consequent high-frequency spin nutation mode, have raised key questions for our understanding of magnetization dynamics…
Spin Inertia as a Source of Topological Magnons: Chiral Edge States from Coupled Precession and Nutation
Subhadip Ghosh, Mikhail Cherkasskii, Ritwik Mondal +2
Spin inertia has been demonstrated to give rise to high-frequency nutational excitations beyond the conventional low-frequency precessional modes. Here, we demonstrate that the hyb…
Ultrafast switching of antiferromagnetic order by field-derivative torque
Pratyay Mukherjee, Ritwik Mondal
Control of magnetic order in antiferromagnets is a central challenge in the development of next-generation spintronic devices. Here, we propose and analyze magnetization switching…
Engineering spin-wave spectrum via the magnetization inertia tensor
Subhadip Ghosh, Darpa Narayan Basu, Ritwik Mondal
Magnetic inertial dynamics has recently been predicted and experimentally demonstrated in two-sublattice ferromagnets such as CoFeB and NiFe permalloy. In this work, we investigate…