1. Current induced noise in CPP spin valves
- Author
-
Zhu, Jian-Gang, Kim, Nayoung, Zhou, Yuchen, Zheng, Youfeng, Chang, Jeiwei, Ju, Kochen, Zhu, Xiaochun, and White, Robert M.
- Subjects
Electromagnetism -- Research ,Valves ,Business ,Electronics ,Electronics and electrical industries - Abstract
In this paper, an experimental investigation of current-induced noise in current perpendicular-to-plane spin-valve heads is reported. It is found that the sense current yields excitations of coherent spin waves as well as substantial 1/f-like noise when current exceeds a critical value. The noise is magnetic in nature. The criticality and current directional dependence of the noise excitation clearly show that the spin transfer is the cause. Index Terms--Current perpendicular-to-plane (CPP) spin-valve read heads, spin transfer, 1/f noise.
- Published
- 2004