“…The insets show the spin-up ͑upper part͒ and spin-down ͑lower part͒ density of states of CrO 2 and the Cr͑001͒ surface. From Wiesendanger, Bürgler, Tarrach, Wadas, et al, 1991. netic atomic layers of Fe͑001͒ epitaxially grown on W͑001͒ substrates ͑Kubetzka et al, 2005;Bode, Vedmedenko, et al, 2006͒, and 1994bWiesendanger and Bode, 2001;Bode, 2003;Wiesendanger et al, 2004;Wulfhekel, 2005;Schwarz et al, 2007͒. Simultaneously …”