Addressing the magnetic properties of sub-monolayers of single-molecule magnets by X-ray magnetic circular dichroism

Fabrizio Moro; Valdis Corradini; Marco Evangelisti; Roberto Biagi; Valentina De Renzi; Umberto del Pennino; Julio C. Cezar; Ross Inglis; Constantinos J. Milios; Euan K. Brechin

doi:10.1039/c0nr00483a

Addressing the magnetic properties of sub-monolayers of single-molecule magnets by X-ray magnetic circular dichroism

Fabrizio Moro, Valdis Corradini, Marco Evangelisti, Roberto Biagi, Valentina De Renzi, Umberto del Pennino, Julio C. Cezar, Ross Inglis, Constantinos J. Milios, Euan K. Brechin

Research output: Contribution to journal › Article › peer-review

Abstract

We report on a comparative study of electronic and magnetic properties of Mn-6 single-molecule magnets (SMMs) grafted on gold surface. Two derivatives with spin-ground states S = 4 and S = 12 have been functionalized with 3-tp-CO2- (3-thiophene carboxylate, tpc) ligands and characterized as thick films (TFs) as well as sub-monolayers (sMLs) by synchrotron based techniques. X-ray absorption spectroscopy at the Mn L-2.3 edges shows the modification of the spectral lineshape in the sMLs with respect to the TFs suggesting that the local symmetry at the Mn sites changes once the molecules are deposited on gold surface. In spite of this, the expected Mn-III oxidation state is preserved. X-ray magnetic circular dichroism (XMCD) spectra show that the total magnetic moment is only given by spin part because of the quenched orbital moment. Moreover, variable temperature and variable field XMCD spectra reveal an effective decrease of the Mn spin moment for both derivatives.

Original language	English
Pages (from-to)	2698-2703
Number of pages	6
Journal	Nanoscale
Volume	2
Issue number	12
DOIs	https://doi.org/10.1039/c0nr00483a
Publication status	Published - Nov 2010

Keywords / Materials (for Non-textual outputs)

HIGH-SPIN
FAMILY
BIS(PHTHALOCYANINATO)TERBIUM
SPECTROSCOPY
NANOMAGNETS
COMPLEXES
BARRIER
CLUSTER
FILMS
GOLD

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10.1039/c0nr00483a

Cite this

@article{1e2950fea535448dafd61b013b00f10f,

title = "Addressing the magnetic properties of sub-monolayers of single-molecule magnets by X-ray magnetic circular dichroism",

abstract = "We report on a comparative study of electronic and magnetic properties of Mn-6 single-molecule magnets (SMMs) grafted on gold surface. Two derivatives with spin-ground states S = 4 and S = 12 have been functionalized with 3-tp-CO2- (3-thiophene carboxylate, tpc) ligands and characterized as thick films (TFs) as well as sub-monolayers (sMLs) by synchrotron based techniques. X-ray absorption spectroscopy at the Mn L-2.3 edges shows the modification of the spectral lineshape in the sMLs with respect to the TFs suggesting that the local symmetry at the Mn sites changes once the molecules are deposited on gold surface. In spite of this, the expected Mn-III oxidation state is preserved. X-ray magnetic circular dichroism (XMCD) spectra show that the total magnetic moment is only given by spin part because of the quenched orbital moment. Moreover, variable temperature and variable field XMCD spectra reveal an effective decrease of the Mn spin moment for both derivatives.",

keywords = "HIGH-SPIN, FAMILY, BIS(PHTHALOCYANINATO)TERBIUM, SPECTROSCOPY, NANOMAGNETS, COMPLEXES, BARRIER, CLUSTER, FILMS, GOLD",

author = "Fabrizio Moro and Valdis Corradini and Marco Evangelisti and Roberto Biagi and {De Renzi}, Valentina and {del Pennino}, Umberto and Cezar, {Julio C.} and Ross Inglis and Milios, {Constantinos J.} and Brechin, {Euan K.}",

year = "2010",

month = nov,

doi = "10.1039/c0nr00483a",

language = "English",

volume = "2",

pages = "2698--2703",

journal = "Nanoscale",

issn = "2040-3364",

publisher = "Royal Society of Chemistry",

number = "12",

}

TY - JOUR

T1 - Addressing the magnetic properties of sub-monolayers of single-molecule magnets by X-ray magnetic circular dichroism

AU - Moro, Fabrizio

AU - Corradini, Valdis

AU - Evangelisti, Marco

AU - Biagi, Roberto

AU - De Renzi, Valentina

AU - del Pennino, Umberto

AU - Cezar, Julio C.

AU - Inglis, Ross

AU - Milios, Constantinos J.

AU - Brechin, Euan K.

PY - 2010/11

Y1 - 2010/11

N2 - We report on a comparative study of electronic and magnetic properties of Mn-6 single-molecule magnets (SMMs) grafted on gold surface. Two derivatives with spin-ground states S = 4 and S = 12 have been functionalized with 3-tp-CO2- (3-thiophene carboxylate, tpc) ligands and characterized as thick films (TFs) as well as sub-monolayers (sMLs) by synchrotron based techniques. X-ray absorption spectroscopy at the Mn L-2.3 edges shows the modification of the spectral lineshape in the sMLs with respect to the TFs suggesting that the local symmetry at the Mn sites changes once the molecules are deposited on gold surface. In spite of this, the expected Mn-III oxidation state is preserved. X-ray magnetic circular dichroism (XMCD) spectra show that the total magnetic moment is only given by spin part because of the quenched orbital moment. Moreover, variable temperature and variable field XMCD spectra reveal an effective decrease of the Mn spin moment for both derivatives.

AB - We report on a comparative study of electronic and magnetic properties of Mn-6 single-molecule magnets (SMMs) grafted on gold surface. Two derivatives with spin-ground states S = 4 and S = 12 have been functionalized with 3-tp-CO2- (3-thiophene carboxylate, tpc) ligands and characterized as thick films (TFs) as well as sub-monolayers (sMLs) by synchrotron based techniques. X-ray absorption spectroscopy at the Mn L-2.3 edges shows the modification of the spectral lineshape in the sMLs with respect to the TFs suggesting that the local symmetry at the Mn sites changes once the molecules are deposited on gold surface. In spite of this, the expected Mn-III oxidation state is preserved. X-ray magnetic circular dichroism (XMCD) spectra show that the total magnetic moment is only given by spin part because of the quenched orbital moment. Moreover, variable temperature and variable field XMCD spectra reveal an effective decrease of the Mn spin moment for both derivatives.

KW - HIGH-SPIN

KW - FAMILY

KW - BIS(PHTHALOCYANINATO)TERBIUM

KW - SPECTROSCOPY

KW - NANOMAGNETS

KW - COMPLEXES

KW - BARRIER

KW - CLUSTER

KW - FILMS

KW - GOLD

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U2 - 10.1039/c0nr00483a

DO - 10.1039/c0nr00483a

M3 - Article

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VL - 2

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EP - 2703

JO - Nanoscale

JF - Nanoscale

IS - 12

ER -

Addressing the magnetic properties of sub-monolayers of single-molecule magnets by X-ray magnetic circular dichroism

Abstract

Keywords / Materials (for Non-textual outputs)

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Advanced Fellowship : Novel Single-Molecule Magnets

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Addressing the magnetic properties of sub-monolayers of single-molecule magnets by X-ray magnetic circular dichroism

Abstract

Keywords / Materials (for Non-textual outputs)

Access to Document

Other files and links

Fingerprint

Projects

Advanced Fellowship : Novel Single-Molecule Magnets

Cite this