Lebrun, R.
Ross, A.
Bender, S. A.
Qaiumzadeh, A.
Baldrati, L.
Cramer, J.
Brataas, A.
Duine, R. A.
Kläui, M.
Article History
Received: 27 April 2018
Accepted: 25 July 2018
First Online: 12 September 2018
Competing interests
: The authors declare no competing interests.