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Scopus: 37 cites, Web of Science: 45 cites,
Magnetic proximity effect features in antiferromagnetic/ferrimagnetic core-shell nanoparticles
Golosovsky, I. V. (Peterburgskiĭ institut i︠a︡dernoĭ fiziki im. B.P. Konstantinova)
Suriñach, Santiago (Suriñach Cornet) (Universitat Autònoma de Barcelona. Departament de Física)
American Physical Society

Data: 2009
Resum: A study of “inverted” core-shell, MnO/γ-Mn2O3, nanoparticles is presented. Crystal and magnetic structures and characteristic sizes have been determined by neutron diffraction for the antiferromagnetic core (MnO) and the ferrimagnetic shell (γ-Mn2O3). Remarkably, while the MnO core is found to have a TN not far from its bulk value, the magnetic order of the γ-Mn2O3 shell is stable far above TC, exhibiting two characteristic temperatures, at T~ 40  K [TC(γ-Mn2O3)] and at T~120  K [~ TN(MnO)]. Magnetization measurements are consistent with these results. The stabilization of the shell moment up to TN of the core can be tentatively attributed to core-shell exchange interactions, hinting at a possible magnetic proximity effect.
Drets: Tots els drets reservats.
Llengua: Anglès
Document: article ; publishedVersion
Publicat a: Physical review letters, Vol. 102, Issue 24 (June 2009) , p. 247201, ISSN 0031-9007

DOI: 10.1103/PhysRevLett.102.247201

4 p, 261.2 KB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup de nanoenginyeria de materials, nanomagnetisme i nanomecànica (Gnm3)
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