Ultrafast spin dynamics and switching via spin transfer torque in antiferromagnets with weak ferromagnetism

作者：Kim Tae Heon; Grunberg Peter; Han Song Hee; Cho Beongki^*

来源：Scientific Reports, 2016, 6(1): 35077.

DOI：10.1038/srep35077

The spin-torque driven dynamics of antiferromagnets with Dzyaloshinskii-Moriya interaction (DMI) were investigated based on the Landau-Lifshitz-Gilbert-Slonczewski equation with antiferromagnetic and ferromagnetic order parameters (l and m, respectively). We demonstrate that antiferromagnets including DMI can be described by a 2-dimensional pendulum model of l. Because m is coupled with l, together with DMI and exchange energy, close examination of m provides fundamental understanding of its dynamics in linear and nonlinear regimes. Furthermore, we discuss magnetization reversal as a function of DMI and anisotropy energy induced by a spin current pulse.

• 出版日期2016-10-7