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Laser ablated pure non-crystalline Co thin films for inductors for ultra-high frequencies

Published online by Cambridge University Press:  21 March 2011

V. Madurga ,
J. Vergara  and
C. Favieres
V. Madurga
Affiliation:
Departamento de Física. Universidad Pública de Navarra. Campus Arrosadía. E-31006 Pamplona., Spain
J. Vergara
Affiliation:
Departamento de Física. Universidad Pública de Navarra. Campus Arrosadía. E-31006 Pamplona., Spain
C. Favieres
Affiliation:
Departamento de Física. Universidad Pública de Navarra. Campus Arrosadía. E-31006 Pamplona., Spain
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Abstract

Non-crystalline Co thin films have been prepared by pulsed laser ablation deposition. From the M-H hysteresis loops measurements, a soft magnetic behavior is observed. Néel type magnetic domain walls are observed in the as-deposited films. The spontaneous magnetization, Ms(T = 300 K), is ≍ 860 emu/cm3. After annealing at 500 oC, Ms(T = 300 K) is ≍ 1460 emu/cm3. The extrapolated to zero K resistance decreases almost two orders of magnitude from the as deposited samples to the crystallized heated at 500 °C ones. A trilayer Co/Cu/Co has shown a real part magnetic susceptibility of 120 at 100 MHz. In the 100 MHz to 1 GHz frequency range, a perpendicular bias magnetic field increased this value up to 270, remaining almost constant for all range.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 674: Symposia T/U/V – Applications of Ferromagnetic and Optical Materials, Storage and Magnetoelectronics , 2001 , T3.2
Copyright
Copyright © Materials Research Society 2001

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References

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