We report the magnetic and transport properties of superlattices grown by molecular-beam epitaxy on (100) with periodicities , 2, 3, 4, 5, 6, 8, and 16. Although the superlattice constituents, and , are both antiferromagnetic insulators, for small the superlattices behave like the ferromagnetic conductor . As increases, the magnetic properties become dominated by the layers, but the electronic transport properties continue to be controlled by the interfaces.
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