Controlling the spins angular momentum in ferromagnets with sequences of picosecond acoustic pulses.

ABSTRACT: Controlling the angular momentum of spins with very short external perturbations is a key issue in modern magnetism. For example it allows manipulating the magnetization for recording purposes or for inducing high frequency spin torque oscillations. Towards that purpose it is essential to modify and control the angular momentum of the magnetization which precesses around the resultant effective magnetic field. That can be achieved with very short external magnetic field pulses or using intrinsically coupled magnetic structures, resulting in a transfer of spin torque. Here we show that using picosecond acoustic pulses is a versatile and efficient way of controlling the spin angular momentum in ferromagnets. Two or three acoustic pulses, generated by femtosecond laser pulses, allow suppressi

SUBMITTER: Kim JW 

PROVIDER: S-EPMC4330532 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature