51. Electronic topological transition and non-collinear magnetism in compressed hcp Co
- Author
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Kvashnin, Y. O., Sun, W., Di Marco, I., and Eriksson, O.
- Subjects
Condensed Matter - Materials Science - Abstract
Recent experiments showed that Co undergoes a phase transition from ferromagnetic hcp phase to non-magnetic fcc one around 100 GPa. Since the transition is of first order, a certain region of co-existence of the two phases is present. By means of \textit{ab initio} calculations, we found that the hcp phase itself undergoes a series of electronic topological transitions (ETTs), which affects both elastic and magnetic properties of the material. Most importantly, we propose that the sequence of ETTs lead to the stabilisation of a non-collinear spin arrangement in highly compressed hcp Co. Details of this non-collinear magnetic state and the interatomic exchange parameters that are connected to it, are presented here., Comment: 16 pages, 6 figures (including supplemental material)
- Published
- 2015
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