Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7886969 | Ceramics International | 2018 | 28 Pages |
Abstract
In this work, we present magnetic phase transition temperatures and magneto-dielectric coupling in MCr2O4 (M = Fe, Co and Ni) ceramics, synthesized using sol-gel auto-combustion route. In order to develop their respective crystalline textures, all these chromites were calcined at 650â¯Â°C for 2â¯h. X-ray diffraction patterns confirmed that FeCr2O4 had a rhombohedral structure while NiCr2O4 and CoCr2O4 exhibited a spinel-type cubic structure. The presence of relevant elements in the specific stoichiometric ratios was confirmed using energy dispersive X-ray spectroscopy. The shapes and sizes of the grains for all the samples were determined using the images obtained from a field emission scanning electron microscope. Temperature dependent magnetic analysis have shown that FeCr2O4, CoCr2O4 and NiCr2O4 are ferromagnetic at 5â¯K and their magnetic phase transition temperatures were measured as 80, 83 and 90â¯K, respectively. Spin-orbit interference was also studied through magneto-dielectric coupling for these chromites using a modified impedance analyzer set-up.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Muhammad Younis, Murtaza Saleem, Shahid Atiq, Shahzad Naseem,