Spin pumping into a spin glass material
Abstract
Spin pumping is a recently established means for generating a pure spin current, whereby spins are pumped from a magnet into the adjacent target material under the ferromagnetic resonance condition. We theoretically investigate the spin pumping from an insulating ferromagnet into spin glass materials. Combining a dynamic theory of spin glasses with the linear-response formulation of the spin pumping, we calculate temperature dependence of the spin pumping near the spin glass transition. The analysis predicts that a characteristic peak appears in the spin pumping signal, reflecting that the spin fluctuations slow down upon the onset of spin freezing.
- Publication:
-
Physical Review B
- Pub Date:
- May 2020
- DOI:
- 10.1103/PhysRevB.101.184412
- arXiv:
- arXiv:1912.02337
- Bibcode:
- 2020PhRvB.101r4412F
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 8 pages, 4 figures