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Structural and magnetic study of Cu FeCr O oxides under high external magnetic fields

Journal of Electronic Materials, ISSN: 0361-5235, Vol: 42, Issue: 6, Page: 1055-1062
2013
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The structural, electronic, and magnetic behaviors of Cu FeCr O polycrystals are investigated. Investigations are conducted for increasing chromium substitution, according to varying x values in the formula versus copper, for x = 0, 0.2, 0.4, 0.6, 0.8, and 1. The magnetic response of polycrystalline samples under increasing external magnetic field from 0.4 T to 5 T is also studied. The partial crystal structure deformation/transition from delafossite CuFeO structure to corundum-type FeCrO structure containing CrO and Cr O blocks is determined. The change in the crystal structure geometry with increasing Cr substitution is observed. Besides, prominent changes in magnetic ordering are observed from antiferromagnetic (x = 1, 0.8, and 0.6) to ferromagnetic ordering (x = 0.4 and 0.2) for high applied external magnetic fields above 2 T. © 2013 TMS.

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