  The magnetic skyrmion-based spin transfer nano-oscillators (STNO) are the
potential candidates for next-generation microwave signal generator and has
gained popularity due to their performance, integrability and compatibility
with existing CMOS technology. However, these devices suffer from the Joule
heating problem that neglects their non-volatility advantage in spintronic
devices. Therefore, it is necessary to investigate the alternative driving
mechanisms for the development of energy-efficient skyrmion based
nano-oscillators. In this paper, a skyrmion-based nano-oscillator has been
designed that utilizes thermal power to drive skyrmion on a thermocoupled
nanotrack. The thermocoupled nanotrack is designed in such a way that both the
upper and lower nanotracks have different values of damping constants and a
temperature difference is maintained between the extreme ends, in order to
create a temperature gradient in the two nanotracks. By employing this
technique, skyrmion is able to exhibit the periodic motion on the nanotrack
with the maximum achievable frequency of 2.5GHz without any external stimuli.
Moreover, the proposed device offers low thermal energy consumption of
0.84fJ/oscillation. Hence, this work provides the pathway for the development
of energy-efficient future spintronic devices.
