Chinnasamy, C. N. ; Narayanasamy, A. ; Ponpandian, N. ; Chattopadhyay, K. ; Shinoda, K. ; Jeyadevan, B. ; Tohji, K. ; Nakatsuka, K. ; Furubayashi, T. ; Nakatani, I. (2001) Mixed spinel structure in nanocrystallineNiFe2O4 Physical Review B, 63 (18). ISSN 0163-1829
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Official URL: http://doi.org/10.1103/PhysRevB.63.184108
Related URL: http://dx.doi.org/10.1103/PhysRevB.63.184108
Abstract
Nanocrystalline NiFe 2 O 4 spinel has been synthesized with various grain sizes by high-energy ball milling. From the high-field magnetization studies and extended x-ray-absorption fine-structure, and Mössbauer measurements in an external magnetic field of 5 T applied parallel to the direction of gamma rays, we could observe that Ni 2 + ions occupy tetrahedral sites on grain-size reduction due to milling. The Fe 3 + spins have a canted structure and the canting angle increases with grain-size reduction. It is possible that the core Fe 3 + spins are also canted because of the magnetocrystalline anisotropy introduced by the occupancy of the Ni 2 + ions in the tetrahedral sites.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society |
| ID Code: | 135408 |
| Deposited On: | 23 Jan 2023 10:19 |
| Last Modified: | 23 Jan 2023 10:19 |
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