Abstract
The temperature variation of the relaxation rate of the domain walls about their transition at T= from the Bloch to the linear Bulaevskii-Ginzburg structure has been investigated in the uniaxial ferrimagnet . The significant suppression of below the mean-field approximation (MFA) value along with the speeding up of (T≤), which is much stronger than that predicted by the MFA, reveals the first evidence for critical fluctuations in a domain wall. The speeding up can be almost quantitatively explained by taking two dimensional fluctuations of the transverse magnetization in the wall into account.
- Received 1 March 1993
DOI:https://doi.org/10.1103/PhysRevLett.71.177
©1993 American Physical Society