Mn-stabilized zirconia: from imitation diamonds to a new potential high-Tc ferromagnetic spintronics material |
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Authors: | Ostanin S Ernst A Sandratskii L M Bruno P Däne M Hughes I D Staunton J B Hergert W Mertig I Kudrnovský J |
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Institution: | Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle (Saale), Germany. |
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Abstract: | From the basis of ab initio electronic structure calculations which include the effects of thermally excited magnetic fluctuations, we predict Mn-stabilized cubic zirconia to be ferromagnetic above 500 K. We find this material, which is well known both as an imitation diamond and as a catalyst, to be half-metallic with the majority and minority spin Mn impurity states lying in zirconia's wide gap. The Mn concentration can exceed 40%. The high-Tc ferromagnetism is robust to oxygen vacancy defects and to how the Mn impurities are distributed on the Zr fcc sublattice. We propose this ceramic as a promising future spintronics material. |
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