Experimental Measurements of Spin Torque Driven Spin Wavesw in Tunneling MR Heads

Author

Zhu, J. ; Zhou, Y.

Author_Institution

Carnegie Mellon Univ., Pittsburgh

fYear

2006

fDate

8-12 May 2006

Firstpage

276

Lastpage

276

Abstract

Microwave oscillation induced by polarized spin current via the effect of spin momentum transfer, also known as spin torque, has been observed in current-perpendicular-to-plane spin valve structures. It has been found that in the spin valve stack, a relatively large sensing current can drive magnetization oscillation into chaotic spin waves, resulting in substantial 1/f-like noise below 1 GHz. In this paper, we present a experimental study of the spin torque, induced microwave oscillation in tunneling magnetoresistive (TMR) read heads used in hard disk drive applications.

Keywords

1/f noise; disc drives; magnetic heads; magnetisation; spin valves; spin waves; tunnelling magnetoresistance; 1/f-like noise; hard disk drive; magnetization oscillation; microwave oscillation; polarized spin current; spin momentum transfer; spin torque driven; spin valve; spin waves; tunneling MR heads; tunneling magnetoresistive read heads; Current measurement; Electrical resistance measurement; Frequency; Magnetic field measurement; Magnetic heads; Magnetization; Performance evaluation; Spin valves; Torque measurement; Tunneling magnetoresistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.375858

Filename

4261709