MOLECULAR NANOMAGNETISM: THE FIRST FREQUENCY DOMAIN MAGNETIC RESONANCE SPECTROMETER IN THE UNITED KINGDOM
Lead Research Organisation:
University of Nottingham
Department Name: Sch of Chemistry
Abstract
This proposal aims to identify novel strategies for preparing better single-molecule magnets. Single-molecule magnets are molecules that show stable magnetisation of purely molecular origin, due to their magnetic anisotropy. They are promising candidates for a bottom-up approach to magnetic data storage materials. One of the advantages is that all the molecules are the same and there is no distribution in the size of the particles. However, the blocking temperature of the magnetisation is still too low. Here we propose to study three classes of single molecule magnets that may show higher blocking temperatures: First of all, those composed of high-anisotropy ions, secondly, those containing ions with an orbital moment, and finally those containing lanthanide ions. We will study these systems using a combination of magnetometry and frequency domain magnetic resonance spectroscopy. The latter is a method that is new to the UK.
Organisations
Publications
Moro F
(2013)
The inherent single-molecule magnet character of trivalent uranium.
in Angewandte Chemie (International ed. in English)
Waters M
(2012)
Synthesis, characterisation and magnetic study of a cyano-substituted dysprosium double decker single-molecule magnet.
in Dalton transactions (Cambridge, England : 2003)
Marx R
(2014)
Spectroscopic determination of crystal field splittings in lanthanide double deckers
in Chemical Science
Van Slageren J
(2012)
New directions in electron paramagnetic resonance spectroscopy on molecular nanomagnets.
in Topics in current chemistry
Schlegel C
(2010)
Magnetic Properties of Two New Fe 4 Single-Molecule Magnets in the Solid State and in Frozen Solution
in Chemistry - A European Journal
Piga F
(2012)
Magnetic properties of a novel family of ferrous cubanes.
in Chemical communications (Cambridge, England)
Pieper O
(2010)
Inelastic neutron scattering and frequency-domain magnetic resonance studies of S = 4 and S = 12 Mn 6 single-molecule magnets
in Physical Review B
Moro F
(2010)
Frequency domain magnetic resonance and magnetic circular dichroism studies on Ni4 cubane molecular nanomagnets: A magnetic anisotropy investigation
in Inorganica Chimica Acta
Mills DP
(2011)
A delocalized arene-bridged diuranium single-molecule magnet.
in Nature chemistry
Description | Frequency Domain magnetic resonance is a very powerful method to investigate magnetic anisotropy in molecular nanomagnets Iron(II) cubane clusters synthesized possess large but positive zero-field splittings Uranium(III) is an excellent ion for the development of improved single-molecule magnets. Observation of crytsal field transitions in lanthanide single-ion magnets unravel magnetization relaxation mechanism in these systems. |