Flux-closure structure formed by four separate magnetic domains in evaporated Permalloy squares. (40 x 40 µm2)
Ch. Ziethen, O. Schmidt, G. H. Fecher, C. M. Schneider, G. Schönhense, R. Frömter, M. Seiderl, K. Grzelakowski, M. Merkel, D. Funnemann, W. Swiech, H. Gundlach, J. Kirschner; J. of Electr. Spectroscopy and Rel. Phenom. 88-91 (1998) 983