Temperature dependence of the exchange parameter and domain-wall properties

The A exchange parameter and its temperature dependence were determined for epitaxially grown magnetic thin garnet films. The method is based on the measurement of saturation magnetization, uniaxial anisotropy field, and zero-field stripe domain period. The temperature dependence of domain-wall energy density and domain-wall width was also determined. A correlation was found between domain-wall pinning field and domain-wall parameters, which can be useful for the experimental verification of theories that describe the coercivity on the basis of domain-wall parameters