Author
Listed:
- J.A. BECKER
(Institut für Physikalische Chemie und Wissenschaftliches, Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg/Lahn, Germany)
- R. SCHÄFER
(Institut für Physikalische Chemie und Wissenschaftliches, Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg/Lahn, Germany)
- J.R. FESTAG
(Institut für Physikalische Chemie und Wissenschaftliches, Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg/Lahn, Germany)
- J.H. WENDORFF
(Institut für Physikalische Chemie und Wissenschaftliches, Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg/Lahn, Germany)
- F. HENSEL
(Institut für Physikalische Chemie und Wissenschaftliches, Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg/Lahn, Germany)
- J. PEBLER
(Fachbereich Chemie, Philipps-Universität Marburg, D-35032 Marburg/Lahn, Germany)
- S.A. QUAISER
(Max-Planck-Institut für Kohlenforschung, D-45470, Mülheim/Ruhr, Germany)
- W. HELBIG
(Max-Planck-Institut für Kohlenforschung, D-45470, Mülheim/Ruhr, Germany)
- M.T. REETZ
(Max-Planck-Institut für Kohlenforschung, D-45470, Mülheim/Ruhr, Germany)
Abstract
Magnetization curves of stabilized cobalt-cluster dispersions in tetrahydrofuran with a narrow size distribution have been studied by SQUID and Gouy balance measurements. The cobalt colloids are generated by a newly developed electrochemical method which allows one to generate clusters with mean cluster sizes of about 1000 atoms. The final size distribution of the clusters is examined by small-angle x-ray scattering (SAXS) and high-resolution transmission electron microscopy (HRTEM) measurements. The magnetization curves have been measured with special emphasis on changes at the freezing point of the solution. The liquid phase shows typical superparamagnetism whereas strong deviations from Langevin behavior occur in the solid dispersion which can be understood in terms of magnetic anisotropy effects. These observations are discussed with regard to recent Stern-Gerlach experiments on isolated ferromagnetic clusters in molecular beams. It is shown that cluster size and susceptibility of the dispersions are related. This permits the control of the growth of the clusters during the electrolysis by measuring the susceptibility as a function of the charge that is converted in the cell.
Suggested Citation
J.A. Becker & R. Schäfer & J.R. Festag & J.H. Wendorff & F. Hensel & J. Pebler & S.A. Quaiser & W. Helbig & M.T. Reetz, 1996.
"Magnetic Properties Of Cobalt-Cluster Dispersions Generated In An Electrochemical Cell,"
Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(01), pages 1121-1126.
Handle:
RePEc:wsi:srlxxx:v:03:y:1996:i:01:n:s0218625x9600200x
DOI: 10.1142/S0218625X9600200X
Download full text from publisher
As the access to this document is restricted, you may want to search for a different version of it.
Corrections
All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:wsi:srlxxx:v:03:y:1996:i:01:n:s0218625x9600200x. See general information about how to correct material in RePEc.
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
We have no bibliographic references for this item. You can help adding them by using this form .
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Tai Tone Lim (email available below). General contact details of provider: http://www.worldscinet.com/srl/srl.shtml .
Please note that corrections may take a couple of weeks to filter through
the various RePEc services.