1. School of Computer Science, University of Manchester, Manchester M13 9PL, United Kingdom
2. Materials Physics, School of ICT, KTH Royal Institute of Technology, Electrum 229, 164 40 Kista, Sweden
3. Spintronics Research Group, Laboratory for Nanotechnology (LNT), VNU-HCM, Ho Chi Minh City, Vietnam
4. Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden