Low-energy magnetic excitations in Co/CoO core/shell nanoparticles.
M. Feygenson, X. Teng, S. E. Inderhees, Y. Yiu, W. Du, W. Han, J. Wen, Z. Xu, A. A. Podlesnyak, J. L. Niedziela, M. Hagen, Y. Qiu, C. M. Brown, L. Zhang, and M. C. Aronson.
Phys. Rev. B 83, 174414 (2011)
M. Feygenson, X. Teng, S. E. Inderhees, Y. Yiu, W. Du, W. Han, J. Wen, Z. Xu, A. A. Podlesnyak, J. L. Niedziela, M. Hagen, Y. Qiu, C. M. Brown, L. Zhang, and M. C. Aronson.
Phys. Rev. B 83, 174414 (2011)
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| (a) The q-integrated scattered intensity I (E) at different temperatures for Co/CoO nanoparticles. Dashed lines indicate the onset of antiferromagnetic order at TN and the dynamical blocking of the Co cores at the blocking temperature TB. (b) Energy dependence of χ(E) for a constant wave-vector cut 0.12 °A−1 wide and centered at q = 1.27 °A−1 (c) The scattered intensity I (q,E) at 150 K. Dark curved lines are shadows from the radial collimator. |
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