The code assumes that the external static magnetic field is applied in the film plane. The film is an exchange-coupled bilayer. The FMR traces are calculated applied-field resolved for a given microwave frequency.
If you need to simulate a single layer film you may set identical magnetic parameters for both layers and L1=L2=0.5L, where L is the thickness of the single-layer film you want tio simulate. You will also need to set the value of the inter-layer exchange constant A12 to A12=n*A1/(L1+L2) .
Enter the number of the mesh steps across the sample thickness:
Enter the thicknesses
Enter Gilbert
Enter
Enter exchange constant A in erg/cm:
Interlayer exchange coupling constant (in erg/cm2)
Enter the conductivity of the metal in (
Enter microwave frequency in rad/s
Enter the dielectric constant for the microstrip/coplanar line
It determines the phase velocity of the electromagnetic wave in the stripline (m/s):
Enter the length of the sample along the microstrip in cm:
Enter the width of the microstrip (or the width of the signal line of the CPW) in cm
Since in cotrast to Gurevich we use exp(-iwt) rather than exp(iwt), the complex field is H-i*α*ω rather than H+i*α*ω:
Surface A (facing the microstrip):
Surface B (facing away from the microstrip):
unitless pinning constant (0: surface spins are fully unpinned, 1: the spins are fully pinned. Any value between 0 nad 1 is allowed.)
Note that for the in-plane magentised films only the
conversion in the conventional pinning constant d in cm-1:
Coresponding surface easy-axis normal uniaxial anisotropy in erg/cm2 (which is the same as mJ/m2):
Charcteristic impedance of the stripline loaded by the film ("loaded stripline,
"l.h. axis) and the respective propgation losses of the signal (r.h. axis)
mean value of dynamic magnetisation across the film thickness (arb. unit) vs applied field (Oe):
Complex impedance of the loaded stripline per unit length (
Reflecton coefficient from the front edge of the sample (essentially S11)
Complex processed S21
Complex unprocessed S21
Output data tables (for copy-pasting in your grahing software:)
Here, additionally, you may calculate thickness profiles for different physical quantities for a particular applied field Hp. (Enter Hp below)
Amplitudes of both in-plane components of dynamic magnetisation vs. point number:
The microwave magnetic field
Their phases in angle degrees
Its phase in angle degrees
Microwave electric field: