Yoshimi, R.
Tsukazaki, A.
Kozuka, Y.
Falson, J.
Takahashi, K.S.
Checkelsky, J.G.
Nagaosa, N.
Kawasaki, M.
Tokura, Y.
Article History
Received: 18 August 2014
Accepted: 12 February 2015
First Online: 14 April 2015
Competing interests
: The authors declare no competing financial interests.