Abstract
We present a combined study of zero-field and NMR at ambient pressure and specific heat and magnetization measurements under pressure up to 2.08 GPa on bulk single crystals of the van der Waals ferromagnet . At ambient pressure, our results consistently demonstrate that undergoes a structural transition at , followed by two subsequent ferromagnetic transitions at and upon cooling. At lowest temperature , two magnetically ordered V sites exist, whereas only one magnetically ordered V site is observed for . Whereas is almost unaffected by external pressure, is highly responsive to pressure and merges with the line at . At even higher pressures , the line merges with the structural transition at which becomes moderately suppressed with for . Taken together, our data point toward a complex magnetic structure and an interesting interplay of magnetic and structural degrees of freedom in .
3 More- Received 19 July 2019
- Revised 16 August 2019
DOI:https://doi.org/10.1103/PhysRevB.100.094408
©2019 American Physical Society