Rhombohedral Distortion in Fe3-yZnyO4 at Verwey Transition |
| A. Kozłowski, Z. Kąkol, R. Zalecki Department of Solid State Physics, University of Mining and Metallurgy, Al. Mickiewicza 30, 30-059 Kraków, Poland K. Knight Rutherford Appleton Laboratory, ISIS, Chilton, UK and J.M. Honig Purdue University, West Lafayette, Indiana, USA |
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| The time-of-flight neutron diffraction data were collected for two Fe3-yZnyO4 powder samples showing different order of the Verwey transition: y=0.0072 - first order, y=0.0249 - second order. Measurements were performed on spallation neutron source in ISIS Rutherford Appleton Laboratory. At low temperatures (below Verwey transition temperature TV) clear splitting of certain reflections characteristic of rhombohedral distortion was observed for both samples. We found that this distortion is much bigger for the sample exhibiting first-order than for the sample showing second-order transition. |
| DOI: 10.12693/APhysPolA.91.443 PACS numbers: 61.12.-q, 64.70.Kb, 75.50.Gg |