Abstract

Magnetic, thermal and elastic properties have been investigated on single crystals of the spin-3/2 kagomé staircase system Co 3V 2O 8. Three phase transitions have been found in zero magnetic field, where the transition temperatures are 11.2, 8.8 and 6.0–7.0 K. Based on the results of the measurements in various magnetic fields along the three crystallographic axes up to 5 T, we construct a detailed H– T phase diagram for each field direction, where results of our neutron diffraction experiments are also used. The existence of many phases seems to be related to the geometrical frustration.

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