[ Identification | Description | Input parameters | Links ]
SpinWave_BCO ComponentSingle-cylinder shape. Absorption included. No multiple scattering. No incoherent scattering emitted. No attenuation from coherent scattering. No Bragg scattering. Bravais lattice only. (i.e. just one spin per sublattice unit cell) Algorithm: 0. Always perform the scattering if possible (otherwise ABSORB) 1. Choose direction within a focusing solid angle 2. Choose mode seperated by applied B-field 3. Calculate the zeros of (E_i-E_f-hbar omega(kappa)) as a function of k_f 4. Choose one value of k_f (always at least one is possible!) 5. Perform the correct weight transformation
| Name | Unit | Description | Default | |
| radius | m | Outer radius of sample in (x,z) plane | ||
| yheight | m | Height of sample in y direction | ||
| sigma_abs | barns | Absorption cross section at 2200 m/s per atom | 1 | |
| sigma_inc | barns | Incoherent scattering cross section per atom | 0 | |
| a1 | AA | Lattice constants of orthorhombic body centred lattice | ||
| a2 | AA | Lattice constants of orthorhombic body centred lattice | ||
| a3 | AA | Lattice constants of orthorhombic body centred lattice | ||
| j | meV | Coupling constant to body centered spins | ||
| ja | meV | Coupling constant to nearest neighbours along a | ||
| jb | meV | Coupling constant to nearest neighbours along b | ||
| jc | meV | Coupling constant to nearest neighbours along c | ||
| j_110 | meV | Coupling constant to nearest neighbours +x+y | 0 | |
| j_110_prime | meV | Coupling constant to nearest neighbours +x-y | 0 | |
| S | 1 | Spin of magnetic ions | ||
| D | meV | Uniaxial anisotropy; easy axis is c-axis. Non-positive value assumed | ||
| B | T | Field strength of external magnetic field applied along z-axis | ||
| FM | 1 | Tag for ferromagnetic system if FM==1 | 0 | |
| Fq | 1 | Magnetic form factor | 1 | |
| mode_input | 1 | Index of mode(s) to simulate | 2 | |
| DW | 1 | Debye-Waller factor | 1 | |
| T | K | Temperature | ||
| e_steps_low | 1 | Number of low-energy steps in zrid | ||
| e_steps_high | 1 | Number of high-energy steps in zrid | ||
| target_x | m | Position of target to focus at. Transverse coordinate | 0 | |
| target_y | m | Position of target to focus at. Vertical coordinate | 0 | |
| target_z | m | Position of target to focus at. Straight ahead. | 0 | |
| target_index | 1 | Relative index of component to focus at, e.g. next is +1 | 0 | |
| focus_r | m | Radius of sphere containing target. | 0 | |
| focus_xw | m | Horiz. dimension of a rectangular area | 0 | |
| focus_yh | m | Vert. dimension of a rectangular area | 0 | |
| focus_aw | deg | Horiz. angular dimension of a rectangular area | 0 | |
| focus_ah | deg | Vert. angular dimension of a rectangular area | 0 | |
| verbose | 1 | Verbosity level | 0 |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
SpinWave_BCO.comp.
[ Identification | Description | Input parameters | Links ]
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