2026-04-14T02:53:10Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/97422025-12-04T20:46:05Zcom_2072_1057col_2072_478822col_2072_478917

Quantum tunneling of domain walls in ferromagnets Chudnovsky, Eugene M., 1948- Iglesias, Òscar Stamp, P. C. E. Magnetisme Histèresi Efecte túnel Física de l'estat sòlid Magnetism Hysteresis Tunneling (Physics) Solid state physics 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. 2009-10-21T09:09:47Z 2009-10-21T09:09:47Z 1992 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0163-1829 https://hdl.handle.net/2445/9742 14943 eng Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.46.5392 Physical Review B, 1992, vol. 46, núm. 9, p. 5392-5404. http://dx.doi.org/10.1103/PhysRevB.46.5392 (c) The American Physical Society, 1992 info:eu-repo/semantics/openAccess 13 p. application/pdf The American Physical Society Articles publicats en revistes (Física de la Matèria Condensada)