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Magnetic Field Effect and Dielectric Anomalies at the Spin Reorientation Phase Transition of GdFe3(BO3)4 | | F. Yen
; B. Lorenz
; Y. Y. Sun
; C. W. Chu
; L. N. Bezmaternykh
; A. N. Vasiliev
; | | Date: |
13 Sep 2005 | | Subject: | Strongly Correlated Electrons; Materials Science | cond-mat.str-el cond-mat.mtrl-sci | | Affiliation: | 1 and 2 and 3), L. N. Bezmaternykh , A. N. Vasiliev ( TCSUH and Department of Physics, University of Houston, Houston, Texas, LBNL, Berkeley, California, HKUST, Hong Kong, Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasn | | Abstract: | GdFe3(BO3)4 exhibits a structural phase transition at 156 K, antiferromagnetic order of the Fe3+ moments at 36 K followed by a spin reorientation phase transition at 9 K. The reorientation phase transition is studied through dielectric, magnetic and heat capacity measurements under the application of external magnetic fields of up to 25 kOe. The dielectric constant indicates the existence of two distinct anomalies at T_SR = 9 K that separate in temperature under external magnetic fields. The spin rotation phase transition is proven to be of the first order nature through the magnetic analogue of the Clausius-Clapeyron equation. Magneto-dielectric effect of up to 1 percent is observed at 8 K and 7 kOe. Uniaxial magnetocaloric effect along the c-axis is observed below the spin reorientation phase transition of 9 K. | | Source: | arXiv, cond-mat/0509310 | | Services: | Forum | Review | PDF | Favorites | |
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