Size effects on the Neél temperature of antiferromagnetic NiO nanoparticles
Resumen: Among all antiferromagnetic transition metal monoxides, NiO presents the highest Neél temperature (TN ~ 525 K). In this work, the size-dependent reduction of TN in NiO nanoparticles with average diameters (D) ranging from 4 to 9 nm is investigated by neutron diffraction. The scaling law followed by TN(D) is in agreement with the Binder theory of critical phenomena in low-dimensional systems. X-ray absorption fine structure measurements link the decrease of TN to the occurrence of size effects (average undercoordination, bond relaxation and static disorder) in the nearest and next-nearest Ni coordination shells that hold the key for the maintenance of the antiferromagnetic order.
Idioma: Inglés
DOI: 10.1063/1.4943062
Año: 2016
Publicado en: AIP advances 6, 5 (2016), 056104 [5pp]
ISSN: 2158-3226

Factor impacto JCR: 1.568 (2016)
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 164 / 275 = 0.596 (2016) - Q3 - T2
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 63 / 87 = 0.724 (2016) - Q3 - T3
Categ. JCR: PHYSICS, APPLIED rank: 82 / 147 = 0.558 (2016) - Q3 - T2

Factor impacto SCIMAGO: 0.956 - Physics and Astronomy (miscellaneous) (Q1) - Nanoscience and Nanotechnology (Q2)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2011-27573-C04
Tipo y forma: Article (Published version)

Creative Commons You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.


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 Record created 2016-04-08, last modified 2020-02-21


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