A ferromagnetic-like phase transition in new oxychalcogenide HgOCuSe

Details A ferromagnetic-like phase transition in new oxychalcogenide HgOCuSe A ferromagnetic-like phase transition in new oxychalcogenide HgOCuSe

2011-05-30

arxiv.org/abs/1105.5868v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

We report the synthesis of a new oxychalcogenide HgOCuSe sample. The resistivity decreases as a function of $T^{1.75}$ with decreasing temperature from room temperature down to around 80 K. There exists a very sharp ferromagnetic-like phase transition at around 60 K under a field of $H$ = 100 Oe. Contrary to the usual ferromagnetic materials, the descending and ascending branches of the magnetic hysteresis curve, at 30 K, are reversed in the whole irreversible field range and the reverse irreversibility decreases at 5 K.

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