regression001.mx3

/* 
	Regression test for bug reported by Ezio Iacocca <ezio.iacocca@physics.gu.se> okt 2013
	failed on GTX TITAN, presumably because of race conditions. Fixed since xyz branch.
*/

Nx := 256
Ny := 256
Nz := 1
SetGridsize(Nx, Ny, Nz)
CellX := 1500e-9/Nx
CellY := 1500e-9/Ny
CellZ := 5e-9
SetCellsize(CellX, CellY, CellZ)

// DEFINE CONTACT
posX := 0.e-9
posY := 0.e-9
Rc := 35.e-9
I := -30e-3

// DEFINE BOUNDARY
ABC := 200e-9
factor := 100

// DEFINE APPLIED FIELD
Happ :=  0 // 0.965
Angle := 70 * pi / 180

// SET MATERIAL PARAMETERS
alpha_v := 0.01
Msat_v  := 700e3
MsatP   := 1200e3
Aex_v   := 10e-12

// ADJUST SOLVER
MaxDt = 1e-12
MinDt = 1e-18
//MaxErr = 1e-5

// SET GEOMETRY AND REGIONS
defregion(1, Ellipse(Rc, Rc).transl(posX,posY,0))
defregion(2, Ellipse(Rc, Rc).transl(posX,posY,0).inverse())
alpha_reg := ceil(ABC/CellX)
for i:=0; i<alpha_reg; i++{
    r_newX := CellX*Nx - ABC + i*CellX
    r_newY := CellY*Ny - ABC + i*CellY
    defregion(i+3, Ellipse(r_newX, r_newY).inverse())
}
setgeom(Ellipse(CellX*Nx, CellY*Ny))
defregion(0, Ellipse(CellX*Nx, CellY*Ny).inverse())

// ALLOCATE VARIABLES
alpha = 1.
Msat = Msat_v
Aex = Aex_v 

// INITIALIZE MAGNETIZATION
for i:=0; i<alpha_reg+2; i++{
    m.setRegion(i+1,uniform(cos(Angle), 0., sin(Angle)))
}

// APPLY FIELDS
B_ext = vector(Happ * cos(Angle), 0., Happ * sin(Angle))

// SCHEDULE OUTPUTS
tableadd(m.Region(1))
tableautosave(5e-12)

//  // OERSTED FIELD CALCULATION
  mask := newSlice(3, Nx, Ny, Nz)
  current := vector(0., 0., I)
  for i:=0; i<Nx; i++{
      for j:=0; j<Ny; j++{
          r := index2coord(i, j, 0)
          r = r.sub(vector(posX, posY, 0))
          b := vector(0, 0, 0)
          if r.len() >= Rc{
              b = r.cross(current).mul(mu0 / (2*pi*pow(r.len(),2)) )
          }else{
              b = r.cross(current).mul(mu0 / (2*pi*pow(Rc,2)) )
          }
          for k:=0; k<Nz; k++{
              mask.set(0, i, j, k, b.X())
              mask.set(1, i, j, k, b.Y())
              mask.set(2, i, j, k, b.Z())
          }
      }
  }
  B_ext.add(mask, 1)
  save(B_ext)

// RUN
run(1e-9)

tol := 1e-3
expectv("m", m.average(), vector(-0.02892563,  -0.418475056, -0.00015423), tol)