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Title: | Quantum tunneling of domain walls in ferromagnets |
Author: | Chudnovsky, Eugene M., 1948- Iglesias, Òscar Stamp, P. C. E. |
Keywords: | Magnetisme Histèresi Efecte túnel Física de l'estat sòlid Magnetism Hysteresis Tunneling (Physics) Solid state physics |
Issue Date: | 1992 |
Publisher: | The American Physical Society |
Abstract: | We present a theoretical study of the quantum depinning of domain walls. Our approach extends earlier work by Stamp and confirms his suggestion that quantum tunneling of domain walls in ferromagnets may reveal itself at a macroscopic level in a manner similar to the Josephson effect in superconductors. The rate of tunneling of a domain wall through a barrier formed by a planar defect is calculated in terms of macroscopic parameters of the ferromagnet. A universal behavior of the WKB exponent in the limit of small barriers is demonstrated. The effect of dissipation on the tunneling rate is studied. It is argued that quantum diffusion of domain walls apparently explains a nonthermal magnetic relaxation observed in some materials at low temperatures. |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.46.5392 |
It is part of: | Physical Review B, 1992, vol. 46, núm. 9, p. 5392-5404. |
URI: | http://hdl.handle.net/2445/9742 |
Related resource: | http://dx.doi.org/10.1103/PhysRevB.46.5392 |
ISSN: | 0163-1829 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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