Controlled 3D-coating of the pores of highly ordered mesoporous antiferromagnetic Co3O4 replicas with ferrimagnetic FexCo3−xO4 nanolayers

Eva Pellicer; Moisés Cabo; Alberto López-Ortega; Marta Estrader; Lluís Yedra; Sònia Estradé; Francesca Peiró; Zineb Saghi; Paul Midgley; Emma Rossinyol; Igor V. Golosovsky; Alvaro Mayoral; Joan D. Prades; Santiago Suriñach; Maria Dolors Baró; Jordi Sort; Josep Nogués

doi:10.1039/C3NR00989K

Controlled 3D-coating of the pores of highly ordered mesoporous antiferromagnetic Co₃O₄ replicas with ferrimagnetic Fe_xCo_3−xO₄ nanolayers†

Eva Pellicer,*^a Moisés Cabo,^a Alberto López-Ortega,^b Marta Estrader,*^bc Lluís Yedra,^de Sònia Estradé,^de Francesca Peiró,^e Zineb Saghi,^f Paul Midgley,^f Emma Rossinyol,^g Igor V. Golosovsky,^h Alvaro Mayoral,ⁱ Joan D. Prades,^j Santiago Suriñach,^a Maria Dolors Baró,^a Jordi Sort^k and Josep Nogués^l

Author affiliations

* Corresponding authors

^a Departament de Física, Facultat de Ciències, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
E-mail: eva.pellicer@uab.cat

^b CIN2(ICN-CSIC) and Universitat Autònoma de Barcelona, Catalan Institute of Nanotechnology, Campus de la UAB, E-08193 Bellaterra, Spain
E-mail: martaestrader@gmail.com

^c Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, Barcelona, Spain

^d TEM-MAT, CCiT-Universitat de Barcelona, Solé i Sabaris 1, Barcelona, Spain

^e LENS-MIND-IN2UB, Departament d'Electrònica, Universitat de Barcelona, Martí i Franquès 1, E-08028 Barcelona, Spain

^f Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, UK

^g Servei de Microscòpia, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain

^h Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, Russia

ⁱ Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, Mariano Esquillor s/n, Zaragoza, Spain

^j EME/XaRMAE/IN2UB, Departament d'Electrònica, Universitat de Barcelona and Institut de Recerca en Energia de Catalunya (IREC), Spain

^k Institució Catalana de Recerca i Estudis Avançats (ICREA) and Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain

^l Institució Catalana de Recerca i Estudis Avançats (ICREA) and CIN2(ICN-CSIC) and Universitat Autònoma de Barcelona, Catalan Institute of Nanotechnology, Campus de la UAB, E-08193 Bellaterra, Spain

Abstract

The controlled filling of the pores of highly ordered mesoporous antiferromagnetic Co₃O₄ replicas with ferrimagnetic Fe_xCo_3−xO₄ nanolayers is presented as a proof-of-concept toward the integration of nanosized units in highly ordered, heterostructured 3D architectures. Antiferromagnetic (AFM) Co₃O₄ mesostructures are obtained as negative replicas of KIT-6 silica templates, which are subsequently coated with ferrimagnetic (FiM) Fe_xCo_3−xO₄ nanolayers. The tuneable magnetic properties, with a large exchange bias and coercivity, arising from the FiM/AFM interface coupling, confirm the microstructure of this novel two-phase core–shell mesoporous material. The present work demonstrates that ordered functional mesoporous 3D-materials can be successfully infiltrated with other compounds exhibiting additional functionalities yielding highly tuneable, versatile, non-siliceous based nanocomposites.

Nanoscale

Controlled 3D-coating of the pores of highly ordered mesoporous antiferromagnetic Co₃O₄ replicas with ferrimagnetic Fe_xCo_3−xO₄ nanolayers†

Abstract

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Controlled 3D-coating of the pores of highly ordered mesoporous antiferromagnetic Co₃O₄ replicas with ferrimagnetic Fe_xCo_3−xO₄ nanolayers

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