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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/175906
Unravelling the elusive antiferromagnetic order in wurtzite and zinc blende CoO polymorph nanoparticles
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Although cubic rock salt‐CoO has been extensively studied, the magnetic properties of the main nanoscale CoO polymorphs (hexagonal wurtzite and cubic zinc blende structures) are rather poorly understood. Here, a detailed magnetic and neutron diffraction study on zinc blende and wurtzite CoO nanoparticles is presented. The zinc blende‐CoO phase is antiferromagnetic with a 3rd type structure in a face‐centered cubic lattice and a Néel temperature of TN (zinc‐blende) ≈225 K. Wurtzite‐CoO also presents an antiferromagnetic order, TN (wurtzite) ≈109 K, although much more complex, with a 2nd type order along the c‐axis but an incommensurate order along the y‐axis. Importantly, the overall magnetic properties are overwhelmed by the uncompensated spins, which confer the system a ferromagnetic‐like behavior even at room temperature.
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ROCA, Alejandro G., et al. Unravelling the elusive antiferromagnetic order in wurtzite and zinc blende CoO polymorph nanoparticles. Small. 2018. Vol. 14, num. 15, pags. 1703963. ISSN 1613-6810. [consulted: 17 of June of 2026]. Available at: https://hdl.handle.net/2445/175906