Kulkarni, GU and Kannan, KR and Arunarkavalli, T and Rao, CNR (1994) Particle-size effects on the value of $T_c$ of $MnFe_2O_4$: Evidence for finite-size scaling. In: Physical Review B, 49 (1). pp. 724-727.
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Abstract
$^{57}Fe$ Mossbauer measurements show that the $T_c$ of $\langle{12}\rangle$-nm particles of $MnFe_2O_4$ is higher than that of the $\langle{33}\rangle$-nm particles, which exhibit the bulk $T_c$ value (573 K). The $^{57}Fe$ isomer shift as well as the internal field are, however, independent of the particle size, as is the cation distribution determined by Mn and Fe extended x-ray absorption fine structure and Mn x-ray absorption near-edge structure measurements at different temperatures. The results confirm that the higher $T_c$ of the $\langle{12}\rangle$rim particles arises from finite-size scaling.
Item Type: | Journal Article |
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Publication: | Physical Review B |
Publisher: | American Physical Society |
Additional Information: | Copyright of this article belongs to American Physical Society. |
Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
Date Deposited: | 27 Sep 2006 |
Last Modified: | 19 Sep 2010 04:30 |
URI: | http://eprints.iisc.ac.in/id/eprint/8212 |
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