help for happening constructive and destructive interference

[Subhrojyoti Mandal]

Hello everyone, I am trying to build a cross device of YIG like this in the figure (capture.png) image . 

 

This is my script for my mumax3 code on this device 

T    = 220e-9        
#dt   = 1e-11
dt   = 20e-12
dx   = 500e-9
dy   = 500e-9      
Nx   = 600
Ny   = 900   
A     = 3.5e-12     
Ms    = 140e3    
alpha = 0.0005
gamma = 1.758e11    
sizeX = 300e-6
sizeY = 450e-6
sizeZ = 90e-9

script = f"""
   //Specify output format
    OutputFormat = OVF2_TEXT
    //mesh
    dx := {dx}
    dy := {dy}
    dz := 90e-9
    Nx := {Nx}
    Ny := {Ny}
    Nz := 1
    sizeX:= {sizeX}
    sizeY:= {sizeY}
    sizeZ:= {sizeZ}
    a:=Cuboid(300e-6, 65e-6, {sizeZ})
    //b:=Cuboid(40e-6, 450e-6, {sizeZ})
    b:=Cuboid(40e-6, 192.5e-6, {sizeZ}).transl(0,128.70e-6, 0)
    c:=Cuboid(40e-6, 192.5e-6, {sizeZ}).transl(0,-128.70e-6, 0)
    d:=a.add(b).add(c)
    SetMesh(Nx, Ny, Nz, dx, dy, dz, 0, 0, 0)
    SetGeom(d)
    Snapshot(geom)
    EdgeSmooth=8
    //External parameters
    f := 1.73e9
    Hac :=5e-5
    Hdc := 0.018
    Msat = {Ms}
    Aex  = {A}
    alpha = {alpha}

    tableadd(B_ext)

    //Static field
    B_ext = vector(Hdc, 0, 0)
    defregion(2,xrange(-50e-6,-40e-6))
    defregion(3,yrange(-97.5e-6, -87.5e-6))
    defregion(4,yrange( 87.5e-6,  97.5e-6))

    //Initial state
    m=uniform(1,0,0)
    //Solver
    relax()
    saveas(m, "relaxed")
    //minimize()
    //Output
    B_ext.setregion(2, vector(Hdc, 0, Hac*sin(2*pi*f*t)))
    B_ext.setregion(3, vector(Hdc, Hac*sin(2*pi*f*t ), 0))
    //running

    defregion(27,xrange(-Inf,-100e-6))
    alpha.setregion(27,1)
    defregion(28,xrange( 148e-6, Inf))
    alpha.setregion(28,1)
    defregion(17,yrange(223e-6,Inf))
    alpha.setregion(17,1)
    defregion(18,yrange(-Inf,-130e-6))
    alpha.setregion(18,1)

    autosave(m,200*{dt})
    tableAdd(m.Region(5));
    tableautosave({dt})
    tableadd(B_ext)
    run({T})
    saveas(m, "final")
    """

Here along Horizontal  axis BVMSW and along verticle axis MSSW is happening and different wavelength is observed for same signal and I have got the same figure for 0 degree phase and pi shifted signal the below one (output.png) .  I  mean proper constructive or destructive interference is not happening. What steps should I take to solve this issue and make a proper constructive and destructive interference?

[Felipe Garcia]

Hello, 

Due to the bias field, you obtain two different wave vectors.  The dispersion relation is anisotropic, as you mention. How is this compatible with destructive interference? Do you mean standing waves from the reflection from the arm in the bottom? It is not clear to me how you would like to obtain interference in the central region. 

Felipe

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[Subhrojyoti Mandal]

I was trying to mimic this experimental work on simulation . But due to different wave vector it is difficult to achieve it . So I tried to go with Forward volume propagation . But I face this type of output (Capture.png) . Not able to getting complete constructive or destructive approach. Can I get any suggestion to approach on this?