Struct DepinningParams 

pub struct DepinningParams {
    pub pinning_strength: f64,
    pub saturation_magnetization: f64,
    pub domain_wall_width: f64,
}

Parameters for computing the depinning field of a domain wall.

Fields

pinning_strength: f64

Pinning potential depth V₀ [J/m²].

saturation_magnetization: f64

Saturation magnetization M_s [A/m].

domain_wall_width: f64

Domain wall width δ_w [m].

Implementations

impl DepinningParams

pub fn new( pinning_strength: f64, saturation_magnetization: f64, domain_wall_width: f64, ) -> Result<Self>

Create new depinning parameters.

Errors

Returns an error if any parameter is non-positive.

pub fn depinning_field(&self) -> f64

Compute the depinning field H_dep [A/m].

H_dep = V₀ / (2 μ₀ M_s δ_w)

This is the minimum external field required to move a domain wall past the pinning center at zero temperature.

pub fn depinning_field_thermal(&self, temperature: f64) -> Result<f64>

Depinning field with thermal activation (Arrhenius-Néel model).

At finite temperature the effective depinning field is reduced:

H_dep(T) = H_dep(0) · [1 - (k_B T / E_b)^(1/μ)]

where E_b is the energy barrier and μ ≈ 1 for a simple Gaussian potential. The barrier is E_b = V₀ · δ_w.

Arguments

• temperature - Temperature [K] (must be >= 0)

Returns

The thermally-reduced depinning field [A/m]. Returns 0 if thermal energy exceeds the barrier.

Trait Implementations

impl Clone for DepinningParams

fn clone(&self) -> DepinningParams

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DepinningParams

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.