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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/10874
Magnetic relaxation measurements of (alpha)-Fe2O3 antiferromagnetic particles below 1 K
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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.
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BARCO, Enrique del, et al. Magnetic relaxation measurements of (alpha)-Fe2O3 antiferromagnetic particles below 1 K. Physical Review B. 2002. Vol. 65, num. núm, pags. 5. ISSN 0163-1829. [consulted: 16 of May of 2026]. Available at: https://hdl.handle.net/2445/10874