Thermally assisted magnetization control and switching of Dy3Fe5O12 and Tb3Fe5O12 ferrimagnetic garnet by low density current

Current-induced magnetization switching is mainly realized by spin-transfer torque or spin-orbital torque, which usually requires an extremely large current density (more than 10(5)A/cm(2)). Here we report a low-energy consumption, stable and reliable, thermal assisted current-induced magnetization switching in devices based on ferrimagnetic RIG (Rare earth garnet ferrite, where R represents rare earth element Dy or Tb). The remanent magnetization of DyIG (Dy3Fe5O12) and TbIG (Tb3Fe5O12) could be switched by applying an external voltage of several volts (corresponding current is tiny and on the order of only 10(-3)A/cm(2)). The remanent magnetization switching of RIG is attributed to the temperature variation (Delta T) induced by the thermal effect of current. The temperature variation Delta T could reach 4.8 K for DyIG at 2 mA/cm(2), and could reach 6.54 K for TbIG at 2.4 mA/cm(2). The remanent magnetization could be switched from - 0.037 to 0.013 emu/g for DyIG, and could be switched from -0.07 to 0.17 emu/g for TbIG. This work might provide a novel way for thermally assisted magnetization switching in ferrimagnetic system.