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. 2015 Jul 8;6:7635. doi: 10.1038/ncomms8635

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(a) The IDM energy density as a function of t_Co⁻¹ for the two measurement methods. Blue squares and black circles show the IDM energy density measured by field dependence (D_H) and dispersion relation (D_k), respectively. The black dot line indicates the spin configuration changes PMA to in-plane magnetic anisotropy (IMA). (b) The IDM energy density as a function of t_CoFeB⁻¹ for the field dependence (D_H). The red dot lines show the limit for our BLS setup. Error bars correspond to the s.d.