Lanthanides (Ln) bis-phthalocyanine (Pc), the so called LnPc2 double decker, are promising class of molecules, with well-defined magnetic anisotropy. In this work, we investigate the magnetic properties of LnPc2 molecules UHV-deposited on the graphene/Ni(111) substrate, and how they modify when an Au layer is intercalated between the Ni and graphene. X-ray absorption spectroscopy (XAS), linear and magnetic circular dichroism (XLD and XMCD) were used to characterize the systems and probe the magnetic coupling between LnPc2 molecules and the Ni substrate through graphene, both gold intercalated or not. Two types of LnPc2 molecules (Ln=Tb, Er) with a different magnetic anisotropy (easy-axis for Tb, easyplane for Er) were considered. XMCD shows an antiferromagnetic coupling between Ln and Ni(111) even in the presence of the graphene interlayer. Au intercalation causes the vanishing of the interaction between Tb and Ni(111). On the contrary, in the case of ErPc2, we found that the gold intercalation does not perturb the magnetic coupling. These results, combined with the magnetic anisotropy of the systems, suggests the possible importance of the magnetic dipolar field contribution in determining the magnetic behaviour.

Probing magnetic coupling between LnPc2 (Ln=Tb, Er) molecules and graphene / Ni(111) substrate with and without Au-intercalation: role of the dipolar field / Corradini, Valdis; Candini, Andrea; Klar, David; Biagi, Roberto; de Renzi, Valentina; Lodi Rizzini, Alberto; Cavani, Nicola; del Pennino, Umberto; Klyatskaya, Svetlana; Ruben, Mario; Velez-Fort, Emilio; Kummer, Kurt; Brookes, Nicholas B.; Gargiani, Pierluigi; Wende, Heiko; Affronte, Marco. - In: NANOSCALE. - ISSN 2040-3364. - 10:1(2018), pp. 277-283. [10.1039/C7NR06610D]

Probing magnetic coupling between LnPc2 (Ln=Tb, Er) molecules and graphene / Ni(111) substrate with and without Au-intercalation: role of the dipolar field

Biagi, Roberto;de Renzi, Valentina;Cavani, Nicola;del Pennino, Umberto;Affronte, Marco
2018

Abstract

Lanthanides (Ln) bis-phthalocyanine (Pc), the so called LnPc2 double decker, are promising class of molecules, with well-defined magnetic anisotropy. In this work, we investigate the magnetic properties of LnPc2 molecules UHV-deposited on the graphene/Ni(111) substrate, and how they modify when an Au layer is intercalated between the Ni and graphene. X-ray absorption spectroscopy (XAS), linear and magnetic circular dichroism (XLD and XMCD) were used to characterize the systems and probe the magnetic coupling between LnPc2 molecules and the Ni substrate through graphene, both gold intercalated or not. Two types of LnPc2 molecules (Ln=Tb, Er) with a different magnetic anisotropy (easy-axis for Tb, easyplane for Er) were considered. XMCD shows an antiferromagnetic coupling between Ln and Ni(111) even in the presence of the graphene interlayer. Au intercalation causes the vanishing of the interaction between Tb and Ni(111). On the contrary, in the case of ErPc2, we found that the gold intercalation does not perturb the magnetic coupling. These results, combined with the magnetic anisotropy of the systems, suggests the possible importance of the magnetic dipolar field contribution in determining the magnetic behaviour.
2018
15-nov-2017
10
1
277
283
Probing magnetic coupling between LnPc2 (Ln=Tb, Er) molecules and graphene / Ni(111) substrate with and without Au-intercalation: role of the dipolar field / Corradini, Valdis; Candini, Andrea; Klar, David; Biagi, Roberto; de Renzi, Valentina; Lodi Rizzini, Alberto; Cavani, Nicola; del Pennino, Umberto; Klyatskaya, Svetlana; Ruben, Mario; Velez-Fort, Emilio; Kummer, Kurt; Brookes, Nicholas B.; Gargiani, Pierluigi; Wende, Heiko; Affronte, Marco. - In: NANOSCALE. - ISSN 2040-3364. - 10:1(2018), pp. 277-283. [10.1039/C7NR06610D]
Corradini, Valdis; Candini, Andrea; Klar, David; Biagi, Roberto; de Renzi, Valentina; Lodi Rizzini, Alberto; Cavani, Nicola; del Pennino, Umberto; Klyatskaya, Svetlana; Ruben, Mario; Velez-Fort, Emilio; Kummer, Kurt; Brookes, Nicholas B.; Gargiani, Pierluigi; Wende, Heiko; Affronte, Marco
File in questo prodotto:
File Dimensione Formato  
Nanoscale_2018_10_277_283_Corradini_Manuscript.pdf

Accesso riservato

Descrizione: articolo principale
Tipologia: Versione pubblicata dall'editore
Dimensione 1.88 MB
Formato Adobe PDF
1.88 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
POST_PRINT_C7NR06610D.pdf

Open access

Tipologia: Versione dell'autore revisionata e accettata per la pubblicazione
Dimensione 2.09 MB
Formato Adobe PDF
2.09 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1155908
Citazioni
  • ???jsp.display-item.citation.pmc??? 5
  • Scopus 25
  • ???jsp.display-item.citation.isi??? 24
social impact