| Author(s): |
Radek Lopusnik; John P. Nibarger; Thomas J. Silva; Zbigniew J. Celinski; |
| Title: |
Different Dynamic and Static Magnetic Anisotropy in Thin Permalloy Films |
| Published: |
July 06, 2003 |
| Abstract: |
The values of uniaxial anisotropy Hk in thin polycrystalline Permalloy films measured by static and dynamic methods differ by as much as a factor 1.5. The anisotropy obtained with a pulsed inductive microwave magnetometer in 2.5-100 nm thick Permalloy films exhibits an additional isotropic component of 120-240 A/m not observed in static measurements. The static anisotropy value was obtained with an inductive magnetic hysteresis loop tracer. The time-resolved precessional response was measured as a function of in-plane magnetic applied bias field and the angle between the easy-axis and the applied bias field. We interpret the constant offset field as a transient component of the magnetic anisotropy that affects only dynamical response at time scales below 10 ns. |
| Citation: |
Applied Physics Letters |
| Volume: |
83 |
| Issue: |
1 |
| Pages: |
pp. 96 - 98 |
| Keywords: |
time resolved;magnetic anisotropy;Permalloy;pulsed inductive microwave magnetometer; |
| Research Areas: |
Electromagnetics |
| PDF version: |
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