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http://hdl.handle.net/2445/10874
Title: | Magnetic relaxation measurements of (alpha)-Fe2O3 antiferromagnetic particles below 1 K |
Author: | Barco, Enrique del, 1968- Durán, M. Hernández Ferràs, Joan Manel Tejada Palacios, Javier Zysler, R. D. Vásquez Mansilla, M. Fiorani, D. |
Keywords: | Relaxació magnètica Propietats magnètiques Magnetic properties Magnetic relaxation |
Issue Date: | 2002 |
Publisher: | The American Physical Society |
Abstract: | In this paper we report magnetic relaxation data for antiferromagnetic a-Fe2O3 particles of 5-nm mean diameter in the temperature range 0.1–25 K. The average spin value of these particles S.124 and the uniaxial anisotropy constant D.1.631022 K have been estimated from the experimental values of the blocking temperature and anisotropy field. The observed plateau in the magnetic viscosity from 3 K down to 100 mK agrees with the occurrence of spin tunneling from the ground state SZ5S. However, the scaling M vs T ln(n0t) is broken below 5 K, suggesting the occurrence of tunneling from excited states below this temperature. |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.65.052404 |
It is part of: | Physical Review B, 2002, vol. 65, núm, 5, p. 52404-1-52404-4 |
URI: | http://hdl.handle.net/2445/10874 |
Related resource: | http://dx.doi.org/10.1103/PhysRevB.65.052404 |
ISSN: | 0163-1829 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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