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. 2016 Oct 26;7:13232. doi: 10.1038/ncomms13232

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Copyright © 2016, The Author(s)

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(a) Ga_1−xMn_xN (sample A) and (b) Ga_1−xMn_xN:Si (sample B). Results are shown for selected temperatures T as a function of the magnetic field H applied parallel (open squares) and perpendicular (closed circles) to the wurtzite c axis. For clarity, experimental error bars are provided only for measurements at 2 K for sample B. Solid lines: magnetization curves calculated for Mn³⁺ ions (sample A) and for Mn³⁺ and Mn²⁺ ions in the case of sample B. T′ are the values of effective temperatures adjusted to account for ferromagnetic Mn³⁺−Mn³⁺ interactions.