Journal
PHYSICAL REVIEW B
Volume 103, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.103.024443
Keywords
-
Funding
- ICTAS Junior Faculty Award
- NSF [DMR-2003914]
- 4-VA, a collaborative partnership for advancing the Commonwealth of Virginia
Ask authors/readers for more resources
In this study, the dephasing length of transverse spin current in ferrimagnetic CoGd alloys was estimated, showing that it is about 4-5 times longer in nearly compensated CoGd than in ferromagnetic metals. The finding suggests that antiferromagnetic order can mitigate spin dephasing and that transverse spin current interacts more strongly with the Co sublattice. These results provide fundamental insights into the interplay between spin current and antiferromagnetic order for engineering spin torque effects in ferrimagnetic and antiferromagnetic metals.
It has been predicted that transverse spin current can propagate coherently (without dephasing) over a long distance in antiferromagnetically ordered metals. Here, we estimate the dephasing length of transverse spin current in ferrimagnetic CoGd alloys by spin pumping measurements across the compensation point. A modified drift-diffusion model, which accounts for spin-current transmission through the ferrimagnet, reveals that the dephasing length is about 4-5 times longer in nearly compensated CoGd than in ferromagnetic metals. This finding suggests that antiferromagnetic order can mitigate spin dephasing-in a manner analogous to spin echo rephasing for nuclear and qubit spin systems-even in structurally disordered alloys at room temperature. We also find evidence that transverse spin current interacts more strongly with the Co sublattice than the Gd sublattice. Our results provide fundamental insights into the interplay between spin current and antiferromagnetic order, which are crucial for engineering spin torque effects in ferrimagnetic and antiferromagnetic metals.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available