The devices we use on a day-to-day basis require a substantial amount of energy to power, but even more energy is left unused and goes to waste. What if our devices were (at least nearly) completely energy efficient? This would help pave the way towards a greener and more energy smart future. This concept is something one team of Japanese researchers is working on, by using quasi antiferromagnetic (AFM) materials which work successfully at the nanoscale. Professor Hiroma Yuasa is based at Kyushu University, Japan, where her laboratory is working on spintronics research. Currently, her focus includes spin current physics and spin torque in artificial magnetic structures, including the applications of these, such as in energy harvesting and ultra-low power consumption devices, which could help in achieving a greener future.