Title :
Standing spinwaves in FeMn/NiFe/FeMn exchange-bias structures
Author :
Speriosu, V.S. ; Parkin, S.S.P. ; Wilts, C.H.
Author_Institution :
IBM Almaden Research Center, San Jose, Ca.
fDate :
9/1/1987 12:00:00 AM
Abstract :
34 GHz ferromagnetic resonance (FMR) measurements of sputtered FeMn/NiFe/FeMn thin films show sinusoidal azimuthal variation of both resonance fields and amplitudes of low and high order spinwaves. Analysis of mode spectra yields an average unidirectional exchange coupling constant Ks=-1.0 erg/cm2. FMR linewidth varies linearly with inverse thickness, indicating a random in-plane distribution in local Ksvalues, with a width of 0.2 erg/cm2. Similar dispersive components normal to the interface are also found. The magnitude of local Ksis comparable to the average over the interface. The thickness of the interfacial transition region is much less than 25Å.
Keywords :
Ferroresonance; Magnetic films/devices; Spin waves; Amplitude estimation; Boundary conditions; Dispersion; Magnetic domain walls; Magnetic field measurement; Magnetic resonance; Magnetic variables measurement; Saturation magnetization; Sputtering; Thickness measurement;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1987.1065443
