Roca, Alejandro G.Golosovsky, Igor V.Winkler, ElinLópez-Ortega, AlbertoEstrader i Bofarull, MartaZysler, Roberto D.Baró, M. D.Nogués, Josep2021-03-292021-03-292018-02-261613-6810https://hdl.handle.net/2445/175906Although 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.12 p.application/pdfeng(c) Wiley-VCH, 2018FerromagnetismeNanopartículesZincFerromagnetismNanoparticlesZincinfo:eu-repo/semantics/article6848592021-03-29info:eu-repo/semantics/openAccess