Bolometric Properties of a Spin-Torque Diode Based on a Magnetic Tunnel Junction

Figure 1

Schematic energy diagram for the potential profile of the CoFeB/MgO/CoFeB structure in the MTJ (top) and the heat dissipation along the MTJ under the microwave current passing through it (bottom). The red arrow shows the heat flux due to the inhomogeneous Joule heating of the MTJ when the power is generated close to the right (left) from the boundary of the tunnel barrier at the mean free path in the corresponding ferromagnetic layer, depending on the direction of the external current. The thicknesses of the layers in the MTJ stack are in nanometers.