Design of compensated ferrimagnetic Heusler alloys for giant tunable exchange bias : Nature Materials : Nature Publishing Group

Design of compensated ferrimagnetic Heusler alloys for giant tunable exchange bias.
Ajaya K. Nayak, Michael Nicklas, Stanislav Chadov, Panchanana Khuntia, Chandra Shekhar, Adel Kalache, Michael Baenitz, Yurii Skourski, Veerendra K. Guduru, Alessandro Puri, Uli Zeitler, J. M. D. Coey, Claudia Felser
Nature Materials 14, 679 (2015) 

a, Uncompensated magnetization, M, in Mn_3−xPt_xGa going through a compensation point (M = 0) at x = 0.59 (upper panel): squares are results from theoretical calculations. The line is a guide to eye. Lower panel: Experimental EB field H_EB at 4.2 K (solid circles). The solid line corresponds to the result of our calculation. The regular and inverse Heusler structures of the Mn₃Ga and Mn₂PtGa are shown to the left and right respectively. b–d, Magnetic moments of Mn in two different sublattices for Mn₃Ga, Mn_2.41Pt_0.59Ga and Mn₂PtGa. Red arrows correspond to Mn in the Mn–Ga plane and blue arrows to Mn in the Mn–Mn planes. The size and direction of the moment is indicated by the arrow. Perfect magnetic compensation is expected in Mn_2.41Pt_0.59Ga. e, FM domains (boundaries indicated by dashed lines) inside the compensated AFM host.