problema202.mx3

Msat  = 1000e3
Aex   = 10e-12

// define exchange length
lex := sqrt(10e-12 / (0.5 * mu0 * pow(1000e3 ,2)))

Bmax  := 100.0e-3
Bstep :=  1.0e-3

for i:=1; i<=40; i+=1{
d     := i * lex                        // we test for d/lex = 30
Sizex := 5*d                             // magnet size x
Sizey := 1*d
Sizez := 0.1*d

nx := pow(2, ilogb(Sizex / (0.75*lex)))  // power-of-two number of cells
ny := pow(2, ilogb(Sizey / (0.75*lex)))  // not larger than 0.75 exchange lengths

SetGridSize(nx, ny, 1)
SetCellSize(Sizex/nx, Sizey/ny, Sizez) 


m = Uniform(1, 0.1, 0)                   // initial mag
relax() 
//save(m)

for B:=-Bmax; B<=Bmax; B+=Bstep{
    B_ext = vector(B, B, B)
    minimize()   // small changes best minimized by minimize()
    tablesave()
}
 

tablesave()
}