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Maruyama, T.; Shiota, Y.; Nozaki, T.; Ohta, K.; Toda, N.; Mizuguchi, M.; Tulapurkar, A. A.; Shinjo, T.; Shiraishi, M.; Mizukami, S.. (2009). Large voltage-induced magnetic anisotropy change in a few atomic layers of iron. , 4(3), 158–161. doi:10.1038/nnano.2008.406 
10.1038/nnano.2008.406