Control of dendrite growth by a magnetic field during directional solidification Yanchao Dai, Dafan Du, Long Hou, Annie Gagnoud, Zhongming Ren, Yves Fautrelle, Rene Moreau and Xi Li EPL, 114 1 (2016) 18001 Published online: 21 April 2016 DOI: 10.1209/0295-5075/114/18001