Friday, June 28, 2013

1306.6488 (N. Qureshi et al.)

Stabilization of the multiferroic spin cycloid in Ni$_3$V$_2$O$_8$ by
light Co-doping

N. Qureshi, E. Ressouche, A. A. Mukhin, V. Yu. Ivanov, S. N. Barilo, V. Skumryev
We present macroscopic and neutron diffraction data on multiferroic lightly Co-doped Ni$_3$V$_2$O$_8$. Doping Co into the parent compound suppresses the sequence of four magnetic phase transitions and only two magnetically ordered phases can be observed. Interestingly, the multiferroic phase with a spiral magnetic structure is stabilized down to at least 1.8 K, which could be revealed by measurements of the electric polarization and confirmed by neutron diffraction on single crystal samples. The magnetic structures are slightly different to the respective ones in the pure Ni compound.
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