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P. Gambardella et al., Nature (London) 416, 301 (2002). The long-range-like ferromagnetic order which is observed for Co wire is probably helped by a finite size (∼15 atoms or longer) of monatomic chains grown at the Pt step edge.
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Easy axes aligned at an angle to high-symmetry axes were reported previously for d-metal thin films [K. Baberschke and M. Farle, J. Appl. Phys. 81, 5038 (1997)] and some 4f bulk materials [M. Colarieti-Tosti et al., Phys. Rev. Lett. 91, 157201 (2003)], and were explained by a competition of second and fourth order MAE constants. This form of MAE is different from that of the Co-wire easy axis as it does not require symmetry breaking.
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Easy axes aligned at an angle to high-symmetry axes were reported previously for d-metal thin films [K. Baberschke and M. Farle, J. Appl. Phys. 81, 5038 (1997)] and some 4f bulk materials [M. Colarieti-Tosti et al., Phys. Rev. Lett. 91, 157201 (2003)], and were explained by a competition of second and fourth order MAE constants. This form of MAE is different from that of the Co-wire easy axis as it does not require symmetry breaking.
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33646635680
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note
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z=0 was adopted in order to simulate the 2D character of the problem, notwithstanding that the supercell calculations themselves are inherently three dimensional.
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20
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3843105469
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J. Trygg, B. Johansson, O. Eriksson, and J. M. Wills, Phys. Rev. Lett. 75, 2871 (1995).
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33646635304
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note
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z=O.
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22
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0036537998
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We estimate the dipolar anisotropy energy not to exceed ∼0.1 meV/atom [cf. M. Eisenbach et al., Phys. Rev. B 65, 144424 (2003)].
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Eisenbach, M.1
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70350623192
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edited by K. H. J. Buschow (Elsevier, Amsterdam)
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P. M. Oppeneer, in Handbook of Magnetic Materials, edited by K. H. J. Buschow (Elsevier, Amsterdam, 2001), Vol. 13, p. 229.
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