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An AC Sub-Kelvin Magnetometer at the University of Zürich Irchel (ASKUZI)

English title An AC Sub-Kelvin Magnetometer at the University of Zürich Irchel (ASKUZI)
Applicant Greber Thomas
Number 150784
Funding scheme R'EQUIP
Research institution Physik-Institut Universität Zürich
Institution of higher education University of Zurich - ZH
Main discipline Condensed Matter Physics
Start/End 01.10.2014 - 31.03.2016
Approved amount 370'000.00
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All Disciplines (2)

Discipline
Condensed Matter Physics
Inorganic Chemistry

Keywords (4)

superconductors; endofullerene; polyoxo metallates (POMs); single molecule magnet

Lay Summary (German)

Lead
"ASKUZI" ist der Kürzel für "AC Sub-Kelvin Magetometer at the University of Zürich Irchel. Mit diesem Instrument ist es möglich die Magnetisierung von kleinsten Mengen vom Molekülen und anderen neuartigen Materialien, in hohen Magnetfeldern und bei Temperaturen unter einem Grad Kelvin auszumessen. Da alle Materialien mehr oder weniger auf Magnetfelder reagieren, d.h. magnetisierter sind, ist dieses Instrument universell einsetzbar und ein zentraler Bestandteil für die Erforschung und Charakterisierung von Materie. Das Betreiber-Konsortium besteht aus zwei Physik Gruppen und einer Gruppe aus der Anorganischen Chemie
Lay summary
Das Instrument "ASKUZI" basiert auf einem supraleitenden Quanteninterferenz Gerät (SQUID), welches erlaubt die Magnetisierung in elementaren Flussquanten des Magnetfeldes zu messen. Die maximal erreichbaren Magnetfelder sind 7 Tesla, was ungefähr dem 140 000 fachen Wert des Erdmagnetfeldes entspricht. Die tiefsten erreichbaren Temperaturen sind im milli Kelvin Bereich, nahe dem absoluten Nullpunkt. Damit können Spins ausgerichtet werden und die kleinsten elementaren Anregungen des Grundzustandes eines Materials vermessen werden. Mit dem neuen Gerät werden also zum Beispiel neuartige molekulare Magnete untersucht, in welchen sich einzelne Atome wie klassische Ferromagnete verhalten können. Solche Substanzen sind Kandidaten für "molekulare Spintronik", wo nicht nur die Ladung der Elektronen (Elektronik), sondern auch ihr Spin als Informationsträger benutzt werden.
 
Direct link to Lay Summary Last update: 17.03.2014

Responsible applicant and co-applicants

Publications

Publication
Mononuclear Clusterfullerene Single-Molecule Magnet Containing Strained Fused-Pentagons Stabilized by a Nearly Linear Metal Cyanide Cluster
Liu F. P., Wang S., Gao C. L., Deng Q. M., Zhu X. J., Kostanyan A., Westerstrom R., Jin F., Xie S. Y., Popov A. A., Greber T., Yang S. F. (2017), Mononuclear Clusterfullerene Single-Molecule Magnet Containing Strained Fused-Pentagons Stabilized by a Nearly Linear Metal Cyanide Cluster, in Angewandte Chemie-International Edition, 56(7), 1830-1834.
Selective arc-discharge synthesis of Dy2S-clusterfullerenes and their isomer-dependent single molecule magnetism
Chen C. H., Krylov D. S., Avdoshenko S. M., Liu F. P., Spree L., Yadav R., Alvertis A., Hozoi L., Nenkov K., Kostanyan A., Greber T., Wolter A. U. B., Popov A. A. (2017), Selective arc-discharge synthesis of Dy2S-clusterfullerenes and their isomer-dependent single molecule magnetism, in Chemical Science, 8(9), 6451-6465.
Single molecule magnet with an unpaired electron trapped between two lanthanide ions inside a fullerene
Liu F. P., Krylov D. S., Spree L., Avdoshenko S. M., Samoylova N. A., Rosenkranz M., Kostanyan A., Greber T., Wolter A. U. B., Buchner B., Popov A. A. (2017), Single molecule magnet with an unpaired electron trapped between two lanthanide ions inside a fullerene, in Nature Communications, 8, 1-9.
Switching Molecular Conformation with the Torque on a Single Magnetic Moment
Kostanyan A., Westerstrom R., Zhang Y., Kunhardt D., Stania R., Buchner B., Popov A. A., Greber T. (2017), Switching Molecular Conformation with the Torque on a Single Magnetic Moment, in Physical Review Letters, 119(23), 237202-1-237202-5.
Triangular Monometallic Cyanide Cluster Entrapped in Carbon Cage with Geometry-Dependent Molecular Magnetism
Liu F. P., Gao C. L., Deng Q. M., Zhu X. J., Kostanyan A., Westerstrom R., Wang S., Tan Y. Z., Tao J., Xie S. Y., Popov A. A., Greber T., Yang S. F. (2016), Triangular Monometallic Cyanide Cluster Entrapped in Carbon Cage with Geometry-Dependent Molecular Magnetism, in Journal of the American Chemical Society, 138(44), 14764-14771.
Methane as a selectivity booster in the arc-discharge synthesis of endohedral fullerenes: Selective synthesis of the single-molecule magnet Dy2TiC@C80 and its congener Dy2TiC2@C80
Junghans K. et al. (2015), Methane as a selectivity booster in the arc-discharge synthesis of endohedral fullerenes: Selective synthesis of the single-molecule magnet Dy2TiC@C80 and its congener Dy2TiC2@C80, in Angewandte Chemie International Edition, 54, 13411-13415.

Collaboration

Group / person Country
Types of collaboration
Lund University, Dr. R. Westerström Sweden (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
University of Hawaii at Manoa, Prof. K. Sattler United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
Hefei National Laboratory for Physical Sciences, Prof. S. Yang China (Asia)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
IFW Dresden, Dr. Popov Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
PSI, Dr. J. Dreiser Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure

Associated projects

Number Title Start Funding scheme
147201 Nitride Cluster Fullerene Spin Shuttles: The role of cluster composition for single molecule magnet behavior 01.04.2014 Project funding
140465 Phase coherence in Bose-Einstein condensates of magnetic bosonic quasiparticles in insulating spin systems 01.04.2012 Project funding
159203 Preparation and characterization of novel unconventional metals 01.10.2015 Project funding
131899 Phasenübergänge in Metallen und magnetischen Systemen 01.10.2010 Project funding
136205 Homogeneous photocatalytic water splitting 01.10.2011 Sinergia

Abstract

A high sensitivity magnetometer in the millisecond and the sub-Kelvin range shall be funded by a R’Equip fund of the Swiss national Science Foundation and the corresponding matching funds of the University of Zurich. With this magnetometer we will be able to further explore the recently discovered molecular magnetism in endofullerenes, the magnetic properties of new polyoxometalate (POM) materials with high potential for single molecule magnets (SMMs), and the superconductivity of new materials. The magnetometer is proposed by a consortium of 3 UZH research groups. It will be housed and operated in the Schilling group that has the necessary infrastructure and know how for such experiments. The implementation of a sub Kelvin 3He kryostat, and of AC susceptibility measurement capability will significantly expand the opportunities for magnetic characterization at UZH.
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