Publication Date:
2015-09-03
Description:
Z n C r 2 O 4 compound is well Known to show the frustration of the spin structure. At 12 K, Z n C r 2 O 4 distorts to break symmetry of the degenerated frustrated spin states by the spin-Peierls-like phase transition, accompanying with the antiferromagnetic ordering. On the other hand, N i C r 2 O 4 undergoes a Jahn–Teller phase transition at a temperature of 310 K, differing from the low temperature ferrimagnetic transition temperature T c of about 60 K. It is also reported that N i C r 2 O 4 shows another magnetic phase transition at about 30 K. These two phase transitions accompanying with the lattice change can be understood by the magneto-elastic interactions. Two interactions, the Jahn–Teller interaction and the spin-Peierls-like interaction are co-exist in N i x Z n 1 - x C r 2 O 4 system. In this report the N i x Z n 1 - x C r 2 O 4 compounds with x = 0.8, 0.6 and 1 are investigated by the X-ray diffraction measurements. From these measurements the crystal structures are determined. The full width at half maximum and integrated intensity give the fruitful information for magnetic elastic interactions.
Electronic ISSN:
2193-1801
Topics:
Natural Sciences in General
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