Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Mondal, Ritwik"'
Autor:
Dutta, Arpita, Mukherjee, Pratyay, Sarangi, Swosti P., Bhattacharjee, Somasree, Pal, Shovon, Mondal, Ritwik
The traditional Landau-Lifshitz-Gilbert (LLG) equation has often delineated the linear and nonlinear magnetization dynamics, even at ultrashort timescales e.g., femtoseconds. In contrast, several other non-relativistic and relativistic spin torques h
Externí odkaz:
http://arxiv.org/abs/2409.08541
Magnetic inertia has emerged as a possible way to manipulate ferromagnetic spins at a higher frequency e.g., THz. Theoretical treatments so far have considered the magnetic inertia as a scalar quantity. Here, we explore the magnetic inertial dynamics
Externí odkaz:
http://arxiv.org/abs/2408.15594
Autor:
Dutta, Arpita, Tzschaschel, Christian, Priyadarshi, Debankit, Mikuni, Kouki, Satoh, Takuya, Mondal, Ritwik, Pal, Shovon
Understanding the complete light-spin interactions in magnetic systems is the key to manipulating the magnetization using optical means at ultrafast timescales. The selective addressing of spins by terahertz (THz) electromagnetic fields via Zeeman to
Externí odkaz:
http://arxiv.org/abs/2408.05510
Publikováno v:
Phys. Rev. B 109, 184424 (2024)
Inertial effects in spin dynamics emerge on picosecond time scales, giving rise to nutational excitations at THz frequencies. Here, we describe a general framework for investigating the precessional and nutational excitations in any type of spin stru
Externí odkaz:
http://arxiv.org/abs/2402.19141
We investigate the impact of non-collinear dual optical excitation on the magnetization precession in a permalloy thin film using two ultrashort laser pulses. By analyzing the magnetization dynamics using time-resolved magneto-optical methods, we fin
Externí odkaz:
http://arxiv.org/abs/2305.00259
Autor:
Mondal, Ritwik, Rózsa, Levente, Farle, Michael, Oppeneer, Peter M., Nowak, Ulrich, Cherkasskii, Mikhail
Publikováno v:
J. Magn. Magn. Mater. 579, 170830 (2023)
The dynamics of magnetic moments consist of a precession around the magnetic field direction and a relaxation towards the field to minimize the energy. While the magnetic moment and the angular momentum are conventionally assumed to be parallel to ea
Externí odkaz:
http://arxiv.org/abs/2303.15251
Autor:
Mondal, Ritwik, Rózsa, Levente
Publikováno v:
Phys. Rev. B 106, 134422 (2022)
Inertial effects in spin dynamics are theoretically predicted to emerge at ultrashort time scales, but their experimental signatures are often ambiguous. Here, we calculate the spin-wave spectrum in ferromagnets and two-sublattice antiferromagnets in
Externí odkaz:
http://arxiv.org/abs/2208.00131
Publikováno v:
Phys. Rev. B 106, 054428 (2022)
Recent experimental observation of inertial spin dynamics calls upon holistic reevaluation of the theoretical framework of magnetic resonance in ferromagnets. Here, we derive the secular equation of an inertial spin system in analogy to the ubiquitou
Externí odkaz:
http://arxiv.org/abs/2204.11057
Publikováno v:
Journal of Applied Physics; 5/7/2024, Vol. 135 Issue 17, p1-8, 8p
Autor:
Mondal, Ritwik, Kamra, Akashdeep
Publikováno v:
Phys. Rev. B 104, 214426 (2021)
We investigate spin pumping current injected by the nutation resonances of a ferromagnet or an antiferromagnet into an adjacent metal. Comparing the dc spin pumping current between the normal precession and nutation resonances, we find that the ratio
Externí odkaz:
http://arxiv.org/abs/2110.05136