Título:
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Macroscopic resonant tunneling of magnetization in ferritin
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Autor/a:
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Tejada Palacios, Javier; Zhang, Xixiang; Barco, Enrique del, 1968-; Hernández Ferràs, Joan Manel; Chudnovsky, Eugene M., 1948-
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Otros autores:
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Universitat de Barcelona |
Abstract:
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We report experimental evidence of macroscopic quantum tunneling in antiferromagnetic particles. The zero-field maximum in the dependence of the magnetic relaxation rate on the magnetic field in ferritin has been observed. This observation provides a new insight into the origin of the nonmonotonic field dependence of the blocking temperature reported recently by Gider et al. [J. Appl. Phys. 79, 5324 (1996)] and by Friedman et al. (unpublished). We argue that the effect comes from the resonant spin tunneling between matching spin levels and cannot be due to the interparticle interactions. Our findings are in agreement with the tunneling interpretation of earlier experiments in ferritin by Awschalom et al. [Phys. Rev. Lett. 68, 3092 (1992)]. |
Materia(s):
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-Materials magnètics -Propietats magnètiques -Efecte túnel -Magnetic materials -Magnetic properties -Tunnel effect |
Derechos:
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(c) American Physical Society, 1997
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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American Physical Society
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