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Title: Reduction of magnetic damping constant of FeCo films by rare-earth Gd doping

Magnetic damping constant (α) is one of the key parameters to determine the critical current density of spin-transfer-torque devices and the switching time of magnetization for ultra-high-frequency devices. In this work, Gd doped FeCo films were fabricated to investigate α based on the ferromagnetic resonance technique. Gd doping not only can efficiently decrease the magnetic inhomogeneity and the extrinsic part of α but also the Landé g-factor and intrinsic part of α. The obtained α was roughly proportional to (g-2){sup 2} and the magnetic anisotropic constant, indicating that the decreased spin-orbit interaction decreases α by Gd doping.
Authors:
; ; ; ; ; ;  [1]
  1. Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000 (China)
Publication Date:
OSTI Identifier:
22310894
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; COBALT ALLOYS; CRITICAL CURRENT; CURRENT DENSITY; DAMPING; DOPED MATERIALS; EQUIPMENT; FERROMAGNETIC RESONANCE; FILMS; GADOLINIUM ADDITIONS; IRON ALLOYS; LANDE FACTOR; L-S COUPLING; MAGNETIC PROPERTIES; MAGNETIZATION; RARE EARTHS; REDUCTION; SPIN; TORQUE