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|Title:||Origin of ferromagnetism in Zn1-x Cox O from magnetization and spin-dependent magnetoresistance measurements||Authors:||Dietl, T.
|Issue Date:||23-Oct-2007||Citation:||Dietl, T., Andrearczyk, T., Lipińska, A., Kiecana, M., Tay, M., Wu, Y. (2007-10-23). Origin of ferromagnetism in Zn1-x Cox O from magnetization and spin-dependent magnetoresistance measurements. Physical Review B - Condensed Matter and Materials Physics 76 (15) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.76.155312||Abstract:||In order to elucidate the nature of ferromagnetic signatures observed in (Zn,Co)O, we have examined experimentally and theoretically magnetic properties and spin-dependent quantum localization effects that control low-temperature magnetoresistance. Our findings, together with a through structural characterization, substantiate the model assigning spontaneous magnetization of (Zn,Co)O to uncompensated spins at the surface of antiferromagnetic nanocrystal of Co-rich wurtzite (Zn,Co)O. The model explains a large anisotropy observed in both magnetization and magnetoresistance in terms of spin Hamiltonian of Co ions in the crystal field of the wurtzite lattice. © 2007 The American Physical Society.||Source Title:||Physical Review B - Condensed Matter and Materials Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/56968||ISSN:||10980121||DOI:||10.1103/PhysRevB.76.155312|
|Appears in Collections:||Staff Publications|
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