High magnetic coercivity in nanostructured Mn3O4 thin films obtained by chemical vapor deposition
Bigiani, Lorenzo (Università degli studi di Padova. Dipartimento di Scienze Chimiche)
Hassan, Mariam (Università Politecnica delle Marche. Dipartimento di Scienze della Materia e Ingegneria, Ambiente e Urbanistica)
Peddis, Davide (Consiglio nazionale delle ricerche. Istituto di Struttura della Materia)
Maccato, Chiara (Università degli studi di Padova. Dipartimento di Scienze Chimiche)
Varvaro, Gaspare (Consiglio nazionale delle ricerche. Istituto di Struttura della Materia)
Sada, Cinzia (Università degli studi di Padova. Dipartimento di Fisica e Astronomia)
Bontempi, Elza (Università degli Studi di Brescia. Dipartimento di Ingegneria Meccanica e Industriale)
Martí-Sánchez, Sara (Institut Català de Nanociència i Nanotecnologia)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Barreca, Davide (Università degli studi di Padova. Dipartimento di Scienze Chimiche)

Additional title:	High low-temperature coercivity in Mn3O4 thin films obtained by chemical vapor deposition
Date:	2019
Abstract:	Nanostructured α-MnO (haussmannite) thin films consisting of evenly interconnected nanoaggregates were prepared on Si(100) substrates by chemical vapor deposition from a Mn(II) diketonate-diamine precursor under different reaction atmospheres (dry vs wet O) and total operating pressures. The combination of chemico-physical results obtained by the joint use of complementary techniques enabled us to demonstrate the obtainment of high-purity MnO materials free from other manganese oxide phases, characterized by controllable structural and morphological characteristics as a function of the adopted processing conditions. Magnetic properties were investigated by analyzing temperature dependence (i. e. , field-cooled and zero-field-cooled measurements) and field-dependence of the magnetization behavior. The obtained films show bulk-like magnetic properties, together with extraordinarily high low-temperature in-plane coercivities (up to ∼1 T). The possibility to tailor these values by varying the content of microstructural defects may foster the implementation of the obtained films in eventual technological applications.
Grants:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327 Agencia Estatal de Investigación ENE2017-85087-C3-3-R Ministerio de Economía y Competitividad SEV-2017-0706
Note:	El títol alternatiu correspon al preprint de l'article publicat.
Note:	Altres ajuts: Funding from CERCA Programme/Generalitat de Catalunya is also acknowledged. Part of the present work has been performed in the framework of Universitat Autònoma de Barcelona Materials Science Ph.D. program.
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Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Mn3O4 ; Thin films ; Chemical vapor deposition ; Magnetic properties ; Coercivity
Published in:	ACS applied nano materials, Vol. 2, issue 3 (March 2019) , p. 1704-1712, ISSN 2574-0970

DOI: 10.1021/acsanm.9b00141

Preprint 24 p, 1.1 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles