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curves of annealed and as-prepared heterostructures. The of (Ga,Mn)As epilayer is denoted as .
(Color online) Hystersis loops for heterostructure after post-field-annealing at for , measured at after cooling the sample from under a magnetic field of (a) and (b) , respectively.
High-resolution TEM images of heterostructure: (a) as-prepared and (b) after postannealing at for . The regions marked with 1, 2, 3, and 4 represent the layers Ta, IrMn, (Ga,Mn)As, and Mn(Ga)As, respectively.
(Color online) Mn-content profile of as-prepared and annealed heterostructure.
Summary of the relationships between and the coercive field , exchange field , and thickness of the interfacial layer .
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