Unidirectional Pumping of Phonons by Magnetization Dynamics

Terahertz magnetization dynamics induced by femtosecond resonant pumping of Dy3+ subsystem in the multisublattice antiferromagnet DyFeO3

Time resolved magnetization dynamics of ultrathin Fe(001) films: spin-pumping and two-magnon scattering.

The time-resolved magnetic response of ultrathin epitaxial Fe(001) films grown on GaAs(001) and covered by Au, Pd, and Cr capping layers was investigated by time and spatially resolved Kerr effect measurements. The magnetization was excited by an in-plane magnetic field pulse using the transient internal field generated at a Schottky barrier while the wavelength of the excitation (resonant mode...

Unidirectional amplification and shaping of optical pulses by three-wave mixing with negative phonons

A possibility to greatly enhance frequencyconversion efficiency of stimulated Raman scattering is shown by making use of extraordinary properties of threewave mixing of ordinary and backward waves. Such processes are commonly attributed to negative-index plasmonic metamaterials. This work demonstrates the possibility to replace such metamaterials that are very challenging to engineer by readily...

Charge pumping by magnetization dynamics in magnetic and semimagnetic tunnel junctions with interfacial Rashba or bulk extrinsic spin-orbit coupling

Farzad Mahfouzi,1 Jaroslav Fabian,2 Naoto Nagaosa,3,4 and Branislav K. Nikolić1,3,* 1Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716-2570, USA 2Institute for Theoretical Physics, University of Regensburg, D-93040 Regensburg, Germany 3Cross-Correlated Materials Research Group (CMRG) and Correlated Electron Research Group (CERG), RIKEN-ASI, Wako, Saitama 351-01...

Unifying ultrafast magnetization dynamics.

We present a microscopic model that successfully explains the ultrafast equilibration of magnetic order in ferromagnetic metals at a time scale tau(M) of only a few hundred femtoseconds after pulsed laser excitation. It is found that tau(M) can be directly related to the so-called Gilbert damping factor sigma that describes damping of GHz precessional motion of the magnetization vector. Indepen...