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| Título: | Remanent magnetization in CoO antiferromagnetic nanoparticles |
Autor: | Silva, Nuno Joâo O.; Millán, Ángel CSIC ORCID ; Palacio, Fernando CSIC ORCID; Puente-Orench, Inés CSIC ORCID; Campo, Javier CSIC ORCID | Fecha de publicación: | sep-2010 | Editor: | American Physical Society | Citación: | Physical Review B 82(9): 094433 (2010) | Resumen: | We report a study on the remanent magnetization Mr induced by field cooling across the ordering temperature TN in antiferromagnetic CoO nanoparticles with different sizes. The nanoparticles are composed by a structurally and magnetically ordered core and a structurally ordered and magnetically disordered shell with a thickness of about 2 nm. The ordered core has cell parameters, moments direction, and modulus similar to those of bulk CoO. Mr is shown to be proportional to the cooling field Hcool. The low-temperature saturation values of Mr [Mr(0)] in the CoO nanoparticles are about two orders of magnitude higher than those found for bulk CoO. Mr/Mr(0) of CoO nanoparticles scales with temperature in a single curve, independently on the magnitude of Hcool and on nanoparticles size, except for temperatures near to TN since TN is size dependent. | Descripción: | 8 páginas, 7 figuras, 1 tabla.-- PACS number(s): 75.30.Cr, 75.50.Ee, 75.50.Tt.-- et al. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.82.094433 | URI: | http://hdl.handle.net/10261/47819 | DOI: | 10.1103/PhysRevB.82.094433 | ISSN: | 1098-0121 | E-ISSN: | 1550-235X |
| Aparece en las colecciones: | (ICMA) Artículos |
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| Remanent magnetization .pdf | 883,82 kB | Adobe PDF |  Visualizar/Abrir |
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