Abstract
Using a transit-time technique, we have measured domain-wall velocities versus applied field H for Bloch, Nêel, and the head-to-head walls in bulk single-crystal bars of yttrium orthoferrite from 150 to 600 °K. Fields as high as 100 Oe were applied and wall velocities exceeding 106 cm/sec were recorded. After correcting for magnetostatic effects, all three walls display a well-defined linear v-H region, with a common mobility μ of 1.2×104 cm/sec Oe at 300 °K. As a function of temperature T the wall mobility varies as 1/T2. From these results it is argued that the mobility arises from thermal spin-wave scattering. Velocities for the three walls become field independent abruptly at vs=4.2×105 cm/sec and maintain this velocity until H exceeds ∼60 Oe, whereupon the velocity again increases. We demonstrate that this ’’saturation’’ at vs is due to the interaction between the wall and the bulk acoustic phonons.
References
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Dates
Type | When |
---|---|
Created | 22 years, 6 months ago (Feb. 14, 2003, 4:46 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 4, 2024, 4:09 p.m.) |
Indexed | 5 months, 1 week ago (March 22, 2025, 4:38 a.m.) |
Issued | 46 years, 8 months ago (Dec. 1, 1978) |
Published | 46 years, 8 months ago (Dec. 1, 1978) |
Published Print | 46 years, 8 months ago (Dec. 1, 1978) |
@article{Tsang_1978, title={Transit-time measurements of domain-wall mobilities in YFeO3}, volume={49}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.324576}, DOI={10.1063/1.324576}, number={12}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Tsang, Ching H. and White, Robert L. and White, Robert M.}, year={1978}, month=dec, pages={6052–6062} }