In the field of mol. spintronics, the use of magnetic mols. for information technol. is a main target and the observation of magnetic hysteresis on individual mols. organized on surfaces is a necessary step to develop mol. memory arrays. Although simple paramagnetic mols. can show surface-induced magnetic ordering and hysteresis when deposited on ferromagnetic surfaces, information storage at the mol. level requires mols. exhibiting an intrinsic remnant magnetization, like the so-called single-mol. magnets (SMMs). These have been intensively investigated for their rich quantum behavior but no magnetic hysteresis has been so far reported for monolayers of SMMs on various nonmagnetic substrates, most probably owing to the chem. instability of clusters on surfaces. Using X-ray absorption spectroscopy and X-ray magnetic CD synchrotron-based techniques, pushed to the limits in sensitivity and operated at sub-kelvin temps., we have now found that robust, tailor-made Fe4 complexes retain magnetic hysteresis at gold surfaces. Our results demonstrate that isolated SMMs can be used for storing information. The road is now open to address individual mols. wired to a conducting surface in their blocked magnetization state, thereby enabling investigation of the elementary interactions between electron transport and magnetism degrees of freedom at the mol. scale.

Magnetic Memory of a Single-molecule Quantum Magnet Wired to a Gold Surface / M., Mannini; F., Pineider; Sainctavit, P. H.; Danieli, Chiara; E., Otero; Sciancalepore, Corrado; Talarico, Anna Maria; M. A., Arrio; Cornia, Andrea; D., Gatteschi; R., Sessoli. - In: NATURE MATERIALS. - ISSN 1476-1122. - STAMPA. - 8:(2009), pp. 194-197. [10.1038/nmat2374]

Magnetic Memory of a Single-molecule Quantum Magnet Wired to a Gold Surface

DANIELI, Chiara;SCIANCALEPORE, Corrado;TALARICO, Anna Maria;CORNIA, Andrea;
2009

Abstract

In the field of mol. spintronics, the use of magnetic mols. for information technol. is a main target and the observation of magnetic hysteresis on individual mols. organized on surfaces is a necessary step to develop mol. memory arrays. Although simple paramagnetic mols. can show surface-induced magnetic ordering and hysteresis when deposited on ferromagnetic surfaces, information storage at the mol. level requires mols. exhibiting an intrinsic remnant magnetization, like the so-called single-mol. magnets (SMMs). These have been intensively investigated for their rich quantum behavior but no magnetic hysteresis has been so far reported for monolayers of SMMs on various nonmagnetic substrates, most probably owing to the chem. instability of clusters on surfaces. Using X-ray absorption spectroscopy and X-ray magnetic CD synchrotron-based techniques, pushed to the limits in sensitivity and operated at sub-kelvin temps., we have now found that robust, tailor-made Fe4 complexes retain magnetic hysteresis at gold surfaces. Our results demonstrate that isolated SMMs can be used for storing information. The road is now open to address individual mols. wired to a conducting surface in their blocked magnetization state, thereby enabling investigation of the elementary interactions between electron transport and magnetism degrees of freedom at the mol. scale.
2009
8
194
197
Magnetic Memory of a Single-molecule Quantum Magnet Wired to a Gold Surface / M., Mannini; F., Pineider; Sainctavit, P. H.; Danieli, Chiara; E., Otero; Sciancalepore, Corrado; Talarico, Anna Maria; M. A., Arrio; Cornia, Andrea; D., Gatteschi; R., Sessoli. - In: NATURE MATERIALS. - ISSN 1476-1122. - STAMPA. - 8:(2009), pp. 194-197. [10.1038/nmat2374]
M., Mannini; F., Pineider; Sainctavit, P. H.; Danieli, Chiara; E., Otero; Sciancalepore, Corrado; Talarico, Anna Maria; M. A., Arrio; Cornia, Andrea; D., Gatteschi; R., Sessoli
File in questo prodotto:
Non ci sono file associati a questo prodotto.
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/11380/613146
Citazioni
  • ???jsp.display-item.citation.pmc??? 69
  • Scopus 964
  • ???jsp.display-item.citation.isi??? 938
social impact