Effect of antiferromagnetic order on the dielectric properties of Bi2Fe4O9

Park, Y. A.; Song, K. M.; Lee, K. D.; Won, C. J.; Hur, N.
March 2010
Applied Physics Letters;3/1/2010, Vol. 96 Issue 9, p092506
Academic Journal
We investigated the dielectric and magnetic properties of Bi2Fe4O9 single crystals. The dielectric anomalies observed at the magnetic transition temperature indicate that there is a strong coupling between the magnetic and dielectric properties. The anisotropic magnetic contribution of the dielectric constant is discussed in terms of the spin correlation function, , below the antiferromagnetic transition at 240 K.


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