Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2978958
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We demonstrate that the addition of Dy capping layers in current perpendicular to the plane giant magnetoresistive spin-valves can increase the critical current density beyond which spin-torque induced instabilities are observed by about a factor of three. While Dy capped samples exhibit nonmagnetic 1/f noise, it is sufficiently small to be unimportant for read head operation at practical data rates. (c) 2008 American Institute of Physics.
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