How to create two unit cells in a .ucf file?

[Li Shan]

Hi VAMPIRE users,

I am trying to create a two-layer structure. I saw the official YouTube video saying that DMI can be added to calculations by using. ucf files. But these two layers will have different unit cell structures. How can I define two different unit cell structures in one. ucf file?

Here is a very sample .mat file that I am using to test:

#---------------------------------------------------
# Number of Materials
#---------------------------------------------------
material:num-materials=2
#---------------------------------------------------
# Material 1 Co up
#---------------------------------------------------
material[1]:material-name=TM_up
material[1]:damping-constant=0.1
material[1]:exchange-matrix[1]=4.585714e-21
material[1]:exchange-matrix[2]=4.585714e-21
material[1]:atomic-spin-moment=1.61 !muB
material[1]:uniaxial-anisotropy-constant=3.73e-23
material[1]:uniaxial-anisotropy-direction = 1,0,0
material[1]:material-element=Fe
material[1]:minimum-height=0.0
material[1]:maximum-height=0.5
material[1]:initial-spin-direction=1,0.1,0
#---------------------------------------------------
# Material 2 Co down
#---------------------------------------------------
material[2]:material-name=TM_down
material[2]:damping-constant=0.1
material[2]:exchange-matrix[1]=4.585714e-21
material[2]:exchange-matrix[2]=4.585714e-21
material[2]:atomic-spin-moment=1.61 !muB
material[2]:uniaxial-anisotropy-constant=3.73e-23
material[2]:uniaxial-anisotropy-direction = -1,0,0
material[2]:material-element=Ag
material[2]:minimum-height=0.5
material[2]:maximum-height=1.0
material[2]:initial-spin-direction=-1,0,0