1. Luxembourg Institute of Science and Technology, Materials Research and Technology Department 1 , 41 rue du Brill, Belvaux L-4422, Luxembourg
2. University of Luxembourg 2 , 41 rue du Brill, Belvaux L-4422, Luxembourg
3. Inter-institutional Research Group Uni.lu–LIST on Ferroic Materials 3 , 41 rue du Brill, Belvaux L-4422, Luxembourg