1. B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine Kharkiv 61103 1 , Ukraine
2. National Science Center Kharkiv Institute of Physics and Technology 2 , Kharkiv 61108, Ukraine
3. Department of Materials Science 3 , Chair of Materials Physics, , Leoben 8700, Austria
4. Montanuniversität Leoben 3 , Chair of Materials Physics, , Leoben 8700, Austria
5. Faculty of Physics, University of Vienna 4 , Wien 1090, Austria
6. Department of Design and Engineering, Faculty of Science and Technology, Bournemouth University Poole 5 , Dorset BH12 5BB, UK
7. Department of Mechanical Engineering, University of Southampton 6 , Southampton SO17 1BJ, UK