PerspectiveSPINTRONICS

Spin pumping gathers speed

See allHide authors and affiliations

Science  10 Apr 2020:
Vol. 368, Issue 6487, pp. 135-136
DOI: 10.1126/science.aba8388

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution

Summary

The discovery of giant magnetoresistance in the mid-1980s demonstrated that magnetic structure can change electric resistivities substantially. Theoretical predictions and experimental demonstration of spin transfer torques in the 1990s demonstrated the inverse effect of injecting spin-polarized electric currents into ferromagnetic metals that could modify magnetic states (1). In general, injection of spin currents into magnetically ordered systems can excite magnetization dynamics (2), and magnetization dynamics can induce spin currents in adjacent materials through spin pumping (3). Coherent spin pumping effects have now been observed with antiferromagnetically ordered materials, as reported on page 160 of this issue by Vaidya et al. (4) and by Li et al. (5). These results provide new opportunities for using spintronics phenomena at ultrafast time scales and considerably higher frequencies, exceeding by several orders of magnitude the limitations of ferromagnetic materials.

View Full Text

Stay Connected to Science